Class / Patent application number | Description | Number of patent applications / Date published |
063032000 | GEM | 64 |
20080271484 | HEART SHAPED DIAMOND CUT HAVING HEARTS AND ARROWS PATTERN - A heart shaped diamond possessing a hearts and arrows pattern characteristic comprising: six main crown facets symmetrically aligned relative to one another, with each of the six main crown facets having a straight edge in parallel alignment with a straight edge of another main crown facet disposed opposite thereto; six main pavilion facets aligned at a fixed given angle of approximately 60° to each other and having a symmetrical number of pavilion half facets such that the six main pavilion facets meet at a point corresponding to the symmetrical central of the diamond and a multiple number of crown star facets spaced apart from one another on the surface of the diamond. The pavilion half facets are arranged in pairs polished on the main pavilion facet with a first pavilion half facet in each pair lying at a first angle of preferably 26.25° relative to a second pavilion half facet in the same pair and with the second pavilion half facet in each pair cut at a second angle of preferably 33.75° relative to the first pavilion half facet in an adjacent pair with which it shares a common boundary. | 11-06-2008 |
20080271485 | TRIANGULAR SHAPED DIAMOND WHICH DISPLAYS HEARTS AND ARROWS PATTERN - A triangular shaped diamond adapted to display a hearts and arrows pattern when exposed to light comparable to the hearts and arrows pattern in a round diamond, comprising: six main crown facets, twelve crown half facets, a table facet, six main pavilion facets and a plurality of girdle facets separating the crown facets from the pavilion facets with each main crown facet having a symmetrically positioned opposite crown facet of substantially equal size surrounding the table facet and having at least one edge in parallel alignment with a corresponding edge in the main crown facet opposite thereto. | 11-06-2008 |
20080271486 | HEXAGON SHAPED DIAMOND WHICH DISPLAYS HEARTS AND ARROWS PATTERN - A hexagonal shaped diamond, adapted to display a hearts and arrows pattern when exposed to light comparable to the hearts and arrows pattern in a round diamond. The hexagon shaped diamond should be cut to form six main crown facets of substantially equal size symmetrically arranged relative to one another surrounding a table facet with each main crown facet having parallel edges symmetrically aligned to the parallel edges of a main crown facet located opposite thereto, six main pavilion facets polished in alignment with the main crown facets, girdle facets separating the pavilion facets from the main crown facets and twelve crown star facets. | 11-06-2008 |
20080271487 | TRIANGULAR STAR SHAPED DIAMOND HAVING HEARTS AND ARROWS PATTERN - A triangular star shaped diamond adapted to display a hearts and arrows pattern when exposed to light comparable to the hearts and arrows pattern in a round diamond, comprising: six main crown facets, twelve crown half facets, a table facet, six main pavilion facets and an even number of main girdle facets separating the crown facets from the pavilion facets with each main crown facet having a symmetrical main crown facet in an opposing relationship and at least one edge in parallel alignment with an edge of the opposing main crown facet. | 11-06-2008 |
20080271488 | OVAL SHAPED DIAMOND CUT HAVING HEARTS AND ARROWS PATTERN - An oval shaped diamond, adapted to display a hearts and arrows pattern when exposed to light characteristic of the hearts and arrows pattern in a round diamond, comprising: an oval shape having two long sides symmetrical to each other, two short sides symmetrical to each other and four corner sides symmetrically located between the long sides and the short sides respectively, eight main crown facets of unequal size and eight main pavilion facets of unequal size, sixteen pavilion half facets; a girdle of non-uniform thickness separating the crown and pavilion facets and two subsidiary pavilion facets in alignment with each other on the long sides of the diamond adjacent a main pavilion facet. | 11-06-2008 |
20080282733 | MEMORY GEMSTONES - Animal or human tissue is digested to extract carbon-containing gases. The digestion process can include hydrolysis, acidogenesis, acetogenesis, and methanogenesis. The step of denitrification can be added if too much nitrogen is produced during digestion. Digestion can also include enzymes that break down the tissue in preparation for methanogenesis. The carbon-containing gas can be added onto or be incorporated throughout a natural or synthetic diamond or other gemstone. The carbon-containing gas can be added during hydrothermal synthesis to create a gemstone with the carbon-containing gas incorporated throughout. | 11-20-2008 |
20090038341 | Round brilliant cut diamond and its incision method - The present invention discloses a round brilliant cut diamond. The diamond includes a crown, a girdle, and a pavilion, the cut crown includes one regular octagon table, eight first facets, eight second facets, and sixteen third facets, wherein the cut pavilion has sixteen quadrangular fourth facets, sixteen quadrangular fifth facets, and sixteen sub-triangular sixth facets. The sixteen fourth facets meet at a point, which forms an apex, and each fourth facet, fifth facet and sixth facet meet a point. The present invention also discloses methods for preparing above mentioned round brilliant-cut diamond. | 02-12-2009 |
20090126402 | GEMSTONES AND METHODS FOR CONTROLLING THE APPEARANCE THEREOF - Methods of fabricating improved gemstones and gemstones thus obtained are described. Roughness is introduced on facets of a gemstone through application of nanometer and/or micrometer sized features, to provide the facets with a hazy white-colored appearance. Alternatively, millimeter-sized reflective features can be applied on the facets, to form a gemstone with improved scintillation or play of light. | 05-21-2009 |
20090183525 | Cut Gemstone Exhibiting Excellent Optical Brilliance - A gemstone including a substantially rectangular girdle, a crown extending in a first direction from the girdle, and a pavilion extending in a second direction from the girdle opposite the first direction. The gemstone has 65 uniquely arranged and angled facets, 25 of which are in the crown, and 40 of which are in the pavilion. The height of the crown is preferably between 9½ to 13½% of the width of the stone, the total depth of the stone is preferably between 63-70.9% of the width of the stone, and the width of the table is preferably between 60-68% of the width of the stone. The crown has four sides, a table, and four bezel facets each positioned at a respective corner of the crown. Each of the four sides of the crown have a first break extending from the girdle toward the table, a second break extending from the first break toward the table, a third break extending from the second break to the table, and a pair of star facets provided between the third break and the bezel facets at each corner of respective side of the crown. Preferably, and relative to a plane parallel to a surface of the table, the first break is cut at an angle of approximately 35-45°, the second break is cut at an angle of approximately 30-40°, the third break is cut at an angle of approximately 25-35°, and the bezel facets are cut at an angle of approximately 20-30°. | 07-23-2009 |
20090260396 | METHODS FOR PROCESSING ORNAMENTAL DIAMONDS AND CORRESPONDING ORNAMENTAL DIAMONDS - A method for processing diamonds and corresponding ornamental diamond structures employ diamonds having visible cloud inclusions. The diamond is cut and polished to form crown and pavilion facets angled so as to form a light transmission window over a readily noticeable portion of an area of the diamond. This renders a geometrical form of the cloud inclusion readily visible to the unaided human eye. Preferably, a major part of the light transmission window is formed by a primary table facet of the crown and a primary base facet of the pavilion angled which are roughly parallel to each other. | 10-22-2009 |
20090308104 | GEMSTONE CUT - A novel gemstone cut that has 162 facets such that the crown has 65 separate facets and the pavilion has 97 separate facets. | 12-17-2009 |
20100005834 | METHOD FOR PRODUCING PRECIOUS OR SEMI-PRECIOUS STONES - A method for producing precious or semi-precious stones comprising the following steps is described:
| 01-14-2010 |
20100083703 | ARTICLE OF BUTTON JEWELRY - One embodiment of an article of button jewelry for covering a button of apparel may include a plurality of stones. The article may also include a body member having a first surface, which may include a plurality of seats. These seats may be arranged in a pattern and may receive the stones therein. The body member may also have a second surface, which may have a plurality of securing members including a first securing member and a second securing member. The article may also include a fastener having a portion that may be pivotally carried by the first securing member. Furthermore, the fastener may another portion that may be capable of latching with the second securing member. The fastener may be constructed and arranged to be coupled with the button to cover the button and carry the body member on the button. | 04-08-2010 |
20100154473 | Round brilliant cut diamond and its incision method - The present invention discloses a round brilliant cut diamond. The diamond includes a crown, a girdle, and a pavilion, the cut crown includes one regular octagon table, eight first facets, eight second facets, and sixteen third facets, wherein the cut pavilion has sixteen quadrangular fourth facets, sixteen quadrangular fifth facets, and sixteen sub-triangular sixth facets. The sixteen fourth facets meet at a point, which forms an apex, and each fourth facet, fifth facet and sixth facet meet a point. A depth of the fourth facets is smaller than 21.6% of the total girdle diameter D. The present invention also discloses methods for preparing above mentioned round brilliant-cut diamond. | 06-24-2010 |
20100300150 | JEWELLERY ITEM INCLUDING SPHERICAL ELEMENTS - The invention relates to a jewelry item including several spherical or near-spherical elements (hereinafter spherical elements) in which each spherical element ( | 12-02-2010 |
20110000259 | GEMSTONE AND METHOD FOR CUTTING THE SAME - A gemstone is provided that has an improved brilliance, especially at the crown portion of the gemstone. The gemstone has a crown angle that is less than an ideal cut round diamond and, preferably the crown angle is less than 27 degrees. By reducing the crown angle of the gemstone, light entering one end of the crown portion may exit the opposite end of the gemstone. In addition, reducing the crown angle reduces the mass necessary for the gemstone. As a result, the gemstone has a width or diameter that corresponds to a larger mass gemstone that is cut according to conventional ideal proportions. | 01-06-2011 |
20110016918 | ORNAMENTAL DIAMOND HAVING TWO-STAGE PAVILION - An ornamental diamond is provided as an extremely bright diamond with numerous reflection patterns when viewed from above its table facet and crown facets. The diamond has the same crown as the round brilliant cut and its pavilion consists of a first pavilion and a second pavilion separated by a horizontal division plane. Lower girdle facets and pavilion main facets are bent by the horizontal division plane between the first and second pavilions, and a first pavilion angle is larger than a second pavilion angle. The ornamental diamond having the two-stage pavilion is much more brilliant than and has twice as many reflection patterns as the conventional round brilliant cut. | 01-27-2011 |
20110030422 | METHOD FOR MANUFACTURING GLASS OR PLASTIC OR CRYSTAL PRODUCT AND GLASS OR PLASTIC OR CRYSTAL PRODUCT MANUFACTURED BY SAID METHOD - The invention relates to a method of manufacturing glass, plastic or crystal products including jewels or noble metals attached thereto and a glass, plastic or crystal product including jewels or noble metals attached thereto, manufactured thereby. The method includes, mounting a jewel or noble metal in a mold, injecting glass, plastic or crystal material into an injector and then melting the glass, plastic or crystal material in the injector, injecting the melted glass, plastic or crystal material liquid into the mold, cooling the glass, plastic or crystal material liquid injected in the mold, thus producing a glass, plastic or crystal product including the jewel or noble metal attached thereto, and demolding the glass, plastic or crystal product including the jewel or noble metal attached thereto from the mold. The invention provides glass, plastic or crystal products with jewels or noble metals as decorative materials, and thus decorative effects of the glass, plastic or crystal products are enhanced. | 02-10-2011 |
20110056243 | NOVEL JEWELRY PIECE OR ARTICLE AND METHOD OF MAKING - A piece or article of jewelry that is made from a metal support including a plate having an upper surface and lower surface with an upstanding peripheral rim on the upper surface that is mounted on the support to be normal to a viewer, and a sealed transparent dome filled with a liquid of a preselected specific gravity and viscosity into which is immersed a plurality of objects of given density. The dome is sealed to the upper surface of said plate and to the upstanding rim. The plurality of objects disperses in said liquid responsive to agitation or disturbance and will slowly settle by gravity to the lowest point of the dome when the agitation or disturbance ceases. A method of making the article of jewelry. | 03-10-2011 |
20110146349 | GEMSTONE AND METHOD FOR CUTTING THE SAME - The invention relates to a gemstone ( | 06-23-2011 |
20110146350 | ROUND BRILLIANT CUT GEMSTONE AND METHOD FOR CUTTING THE SAME - The invention relates to a gemstone ( | 06-23-2011 |
20110239705 | DECORATIVE JEWEL AND METHOD FOR CUTTING DECORATIVE JEWEL - The color stone | 10-06-2011 |
20110302960 | Gemstone cut shape providing a specific optical pattern - A gemstone cut with a table facet, where the gemstone receives existing light from around the viewer and the facets on the bottom of the diamond effectively reflect the existing light back into the eyes of the beholder in such a manner as to maximize light performance, and to produce a unique and distinct look of light in the form of a Maltese cross under the table facet which can be observed in natural ambient light. | 12-15-2011 |
20120024010 | ENHANCING THE OPTICAL CHARACTERISTICS OF A GEMSTONE - Various embodiments described herein comprise a gemstone or other piece of jewelry, which incorporates one or more diffractive optical elements to enhance the fire displayed by the gemstone. In certain embodiments, the diffractive optical element comprises a diffraction grating etched on one or more facets of the gemstone. | 02-02-2012 |
20120060557 | Cut Product, in Particular Diamond, with Improved Characteristics and Method for Manufacturing Such a Product - Cut product manufactured from a (semi) precious stone material, more particularly from natural or synthetic diamond, comprising a lower part (pavilion) with a bottom end (culet); an upper part (crown) having a number of girdle bezel facets and a top end (a point with table width | 03-15-2012 |
20120079853 | GEM WITH BRILLIANT CUT - Brilliant-cut gemstone, wherein the crown angle (α) is between 32.8° and 33.0°. | 04-05-2012 |
20120096898 | Product with Improved Optical Characteristics - Cut product manufactured from a rough (semi) precious stone material, more particularly from diamond, comprising a lower part (pavilion) with a bottom end (culet); an upper part (crown) with a number of facets and a top end (a point with table width | 04-26-2012 |
20120103016 | CUSTOM STONES AND METHODS FOR PRODUCING CUSTOM STONES FOR JEWELRY - A stone for jewelry is provided that includes a first layer made of a first material; a second layer made of a second material bonded to the first layer; and a third layer made of a third material bonded to the second layer. The second material or layer is preferably made of a colored gel sheet. | 05-03-2012 |
20120180525 | ROUND GEMSTONE CUT SHAPE PROVIDING A SPECIFIC OPTICAL PATTERN - A gemstone cut with a table facet, where the gemstone receives existing light from around the viewer and the facets on the bottom of the diamond effectively reflect the existing light back into the eyes of the beholder in such a manner as to maximize light performance, and to produce a unique and distinct look of light in the form of a flower with eight rounded pedals under the table facet which can be observed in natural ambient light. | 07-19-2012 |
20120227444 | GEMSTONE WITH A CHATON CUT - Gemstone with a chaton cut, in which tapering facets of a crown adjoin a flat table all the way round inclined relative to the table, the said facets extending as far as a rondist at which the gemstone has the largest transverse dimension, wherein a pavilion of facets preferably terminating at a point adjoins below the rondist, and wherein the gemstone is at least partially made of glass, and wherein the crown angle (α) is between 40.5° and 42.5°. | 09-13-2012 |
20120291487 | GEMSTONE OF NATURAL DIAMOND AND METHOD APPLIED THERETO - Gemstone of natural diamond, characterised in that the gemstone ( | 11-22-2012 |
20120297826 | Gemstone Cut With Improved Characteristics - A gemstone cut is provided with a strategic placement of facets that optimizes the three dimensional optically geometric light interactions to thereby produce unique characteristics. In one embodiment, the gemstone has a crown with 29 facets, a pavilion with 28 facets and a girdle with 32 facets. The crown has a table with an octagonal shape, four first star facets, four second star facets, eight kite facets, eight first upper girdle facets and four second upper girdle facets. The pavilion can have eight pavilion facets, eight intermediate pavilion facets, eight first lower girdle facets and four second lower girdle facets. The girdle can have 32 facets including four sides each having seven facets and four facets at the corners of the gemstone interspaced between the side facets. The gemstone has four-fold mirror-image symmetry. | 11-29-2012 |
20130019636 | MODIFIED PRINCESS CUT DIAMOND HAVING HEARTS AND ARROWS PATTERN AND METHOD - A modified princess cut diamond and method of forming a modified princess cut diamond into a symmetrical shape possessing a hearts and arrows pattern characteristic of the true hearts and arrows pattern in a round cut diamond. The modified princess cut diamond includes: a tablet facet, 4 main crown facets, 8 crown halves, 8 crown star facets, 4 subsidiary crown facets, 8 subsidiary crown halves, 8 main pavilion facets, 4, subsidiary pavilion facets, 16 pavilion halves and a girdle with each main crown facet having a pair of crown star facets symmetrically disposed on one side thereof adjacent to the tablet facet and a pair of crown halves symmetrically disposed on the opposite sides thereof with each pair of crown star facets having the side thereof adjoining the table facet meeting at a point equal to essentially half the longer distance of the main crown facet measured horizontally and with all crown star facets and crown halves adjacent each main crown having identical polished angles with a maximum tolerance of 0.30. | 01-24-2013 |
20130042648 | FACET PATTERNS AND ARRANGEMENTS FOR GEMSTONES - The present invention relates to the cut of a gemstone, and particularly to facet patterns and arrangements for modified round brilliant cut gemstones having fifty-eight facets. In one embodiment, a facet pattern for the crown of a gemstone includes an octagonal facet; a plurality of triangular star facets; a plurality of triangular upper main facets; a plurality of upper girdle facets; a plurality of quadrilaterals lower main facets, a plurality of triangular lower main facets, and a plurality of lower girdle facets. Both the lower and upper girdle facets have at least one scalloped edge. | 02-21-2013 |
20130055763 | Hearts & Arrows SiC Gemstone - The instant application discloses, among other things, a specific set of cutting proportions tailored for the optical characteristics of Silicon Carbide (“SiC”) which may produce a “Hearts & Arrows” reflection pattern. | 03-07-2013 |
20130125585 | HEART SHAPED DIAMOND CUT HAVING HEARTS AND ARROWS PATTERN - A heart shaped diamond possessing a hearts and arrows pattern characteristic comprising: eight main crown facets symmetrically aligned relative to one another, with each of the eight main crown facets having a straight edge in parallel alignment with a straight edge of another main crown facet disposed opposite thereto; eight main pavilion facets aligned at a fixed given angle of approximately 45° to each other and converging at a common point corresponding to the center of the diamond; sixteen pavilion half facets aligned at 22.5° with respect to each other, a girdle which is non-uniform and has a substantially unequal thickness throughout the diamond, a table facet, and a multiple number of crown star facets in an arrangement surrounding the table facet. | 05-23-2013 |
20130213090 | Hearts & Arrows SiC Cushion-Cut Gemstone - The instant application discloses, among other things, a specific set of cutting proportions tailored for the optical characteristics of Silicon Carbide (“SiC”) cushion-cut gemstone which may produce a “Hearts & Arrows” reflection pattern. | 08-22-2013 |
20130239614 | Sapphire Coated Gemstone - The present invention provides a diamond simulant with greater similarity to a diamond than cubic zirconia. The present invention further provides a diamond simulant with durability, hardness, and optical features closer to that of a genuine diamond that previously afforded by other diamond simulants, such as cubic zirconia. | 09-19-2013 |
20130239615 | METHOD FOR GROWING WHITE COLOR DIAMONDS BY USING DIBORANE AND NITROGEN IN COMBINATION IN A MICROWAVE PLASMA CHEMICAL VAPOR DEPOSITION SYSTEM - The present application discloses the details of a microwave plasma chemical vapor deposition process that uses Nitrogen and Diborane simultaneously in combination along with the Methane and Hydrogen gases to grow white color diamonds. The invention embodies using nitrogen to avoid inclusions and impurities in the CVD diamond samples and Diborane for the color enhancement during the growth of diamond. It is also found that heating of the so grown diamonds to 2000 C results in significant color enhancement due to the compensation of Nitrogen and Boron centers in the samples. The origin of the various colors in diamond is explained on the basis of the band diagram of CVD diamond. | 09-19-2013 |
20130291589 | Silicon Carbide Princess Cut Gemstone - The instant application discloses, among other things, a specific set of cutting proportions tailored for the optical characteristics of Silicon Carbide (“SiC”) Princess cut gemstone. | 11-07-2013 |
20130298605 | Silicon Carbide Asscher Cut Gemstone - The instant application discloses, among other things, a specific set of cutting proportions tailored for the optical characteristics of Silicon Carbide (“SiC”) Asscher cut gemstone. | 11-14-2013 |
20130319045 | Silicon Carbide Krupps Cut Gemstone - The instant application discloses, among other things, a specific set of cutting proportions tailored for the optical characteristics of Silicon Carbide (“SiC”) Krupps cut gemstone. | 12-05-2013 |
20130327090 | Hearts & Arrows SiC Gemstone - The instant application discloses, among other things, a specific set of cutting proportions tailored for the optical characteristics of Silicon Carbide (“SiC”) which may produce a “Hearts & Arrows” reflection pattern. | 12-12-2013 |
20140013800 | JEWELRY ARTICLE WITH FORMED ILLUSION PLATE - The present invention is directed to an ornament which gives the aesthetic appearance of a gemstone in a setting, but includes an illusion plate in a well so as to accentuate any material resting on the plate. | 01-16-2014 |
20140013801 | Hearts & Arrows SiC Gemstone - The instant application discloses, among other things, a specific set of cutting proportions tailored for the optical characteristics of Silicon Carbide (“SiC”) which may produce a “Hearts & Arrows” reflection pattern. | 01-16-2014 |
20140026616 | DECAGONAL SHAPED DIAMOND WHICH DISPLAYS HEARTS AND ARROWS PATTERN - A decagonal shaped diamond, adapted to display a hearts and arrows pattern when exposed to light comparable to the hearts and arrows pattern in a round diamond. The decagonal shaped diamond should be cut to form ten main crown facets of substantially equal size symmetrically arranged relative to one another surrounding a table facet twenty star facets with two star facets polished on every main crown facet, ten main pavilion facets, an equal number of crown half facets as pavilion half facets, ten subsidiary pavilion half facets, twenty subsidiary pavilion facets and ten main girdle facets with the girdle facets polished at a given angle relative to one another for forming the decagonal shape of the diamond. | 01-30-2014 |
20140033765 | METHOD FOR DETERMINING A CUT FOR A GEMSTONE - Method for determining a cut for a gemstone, comprising selecting a generic shape for the cut; selecting a plurality of cut designs of a group of cut designs having the selected generic shape; simulating a number of optical metrics for the plurality of cut designs using simulation models having modeling coefficients; selecting one or more cut designs of the plurality of cut designs based on the simulated optical metrics; varying the geometry parameters for each selected cut design within a range, simulating a number of optical metrics for said range of geometry parameters, and determining an optimized cut design having optimized geometry parameters based on the simulated number of optical metrics for said range; cutting and polishing of the gemstone using the optimized cut design having the optimized geometry parameters; analyzing the visual appearance of the polished gemstone; changing or adapting the simulation models and/or the modeling coefficients thereof and/or the range for varying the geometry parameters and/or a cut design of the plurality of cut designs, and/or adding one or more new cut designs to the group of cut designs, on the basis of the analysis of the visual appearance. | 02-06-2014 |
20140075991 | MULTI-COLOR GEMSTONE COATING TECHNOLOGY - The present invention discloses a gemstone comprising a table, a crown and a pavilion. Certain areas of the surfaces of the gemstone are coated with at least one layer of multi-color thin film comprising at least two (2) types of metallic compounds. A layer of DLC protective coating is deposited on top of the multi-color thin film. The said multi-color thin film can be deposited on the table of the gemstone, the table and crown of the gemstone, on certain areas of the pavilion, or on all surfaces of the gemstone. The deposition of the multi-color thin film can be achieved through several low temperature vapor-coating techniques such as sputtering, chemical vapor deposition (CVD) and physical vapor deposition (PVD), ARC Source deposition, PLD, and MED. | 03-20-2014 |
20140116088 | GEMSTONE CUT - A gemstone cut into a round stone and method of cutting a gemstone are disclosed herein. A crown having a table may be surrounded by eight star sets. The eight star sets may be surrounded by eight bezel facets. The eight bezel facets may be surrounded by eight pairs of upper girdle facet sets. Each upper girdle facet set may have one primary upper girdle facet and two secondary upper girdle facets. Each star set may have one primary star facet and four secondary star facets. A bottom having a culet may be surrounded by 8 pavilions the eight pavilions may be surrounded by 8 lower girdle facet sets. Each lower girdle facet set may have one primary lower girdle facet and two secondary lower girdle facets. Both the crown and bottom may be surrounded by 16 girdle facets or by perfectly circular girdle. | 05-01-2014 |
20140352354 | COMPOSITE GEMSTONE AND METHOD OF PRODUCTION THEREOF - The invention discloses a composite gemstone for use in jewelry, formed of two or more adjacent precious stones, bonded to one another in a permanent manner without use of adhesive. The appearance is that of a single homogenous stone, with high grade optical properties as measured spectroscopically. “Low height” diamonds may be used for forming the composite, when to date such low height diamonds are considered non-profitable for jewelry. A process for the production of such composite gemstones is disclosed. | 12-04-2014 |
20150007610 | ORNAMENTAL DEVICE COMPRISING A STONE - The invention relates to an ornamental device ( | 01-08-2015 |
20150020544 | CUSHION SHAPED HEARTS AND ARROWS GEMSTONE AND METHOD - A cushion cut diamond and method for polishing a diamond to form a cushion cut which will display a hearts and arrows pattern characteristic of the true hearts and arrows pattern in a round cut diamond when subjected to light. The cushion cut is formed by polishing a diamond into a symmetrical rounded shaped geometry having four curvilinear long sides and four curvilinear corner sides of equal radius with the four curvilinear corner sides interconnecting the four curvilinear long sides to form the rounded shape; forming 4 main crown facets of substantially equal geometry and dimension symmetrically positioned on the four long sides of the diamond with the 4 main crown facets on the four corner sides being equal in geometry and dimension and symmetrically positioned on the four corner sides and further comprising a table facet, 8 crown star facets on the main crown sides adjacent the table facet; 16 crown halve facets. surrounding the four long sides and four corner sides of the diamond; 8 main pavilion facets, 16 pavilion half facets, 4 subsidiary pavilion facets, 16 subsidiary pavilion half facets and multiple girdle facets on both the long and corner sides of the diamond with the girdle facets being of varying thickness wherein the hearts and arrows pattern generated by the cushion shaped diamond gemstone forms 8 perfectly symmetrical arrows and 8 perfectly symmetrical hearts when visually observed through a conventional scope in the presence of light. | 01-22-2015 |
20150052947 | GEMSTONE CUT - A gemstone cut into a round stone and method of cutting a gemstone are disclosed herein. A crown having a table may be surrounded by eight star sets. The eight star sets may be surrounded by eight bezel facets. The eight bezel facets may be surrounded by eight pairs of upper girdle facet sets. Each upper girdle facet set may have one primary upper girdle facet and two secondary upper girdle facets. Each star set may have one primary star facet and four secondary star facets. A bottom having a culet may be surrounded by 8 pavilions the eight pavilions may be surrounded by 8 lower girdle facet sets. Each lower girdle facet set may have one primary lower girdle facet and two secondary lower girdle facets. Both the crown and bottom may be surrounded by 16 girdle facets or by perfectly circular girdle. | 02-26-2015 |
20150059404 | COLORFUL AND BRIGHT DIAMOND - The present invention involves the field of jewellery products, and especially, relates to a colourful and bright diamond which comprises an even number of main crown facets and an even number of main pavilion facets. The colourful and bright diamond has a total reflection gross efficiency of two 90% and the optical performance which is 12 times more than the existing ordinary diamonds. | 03-05-2015 |
20150059405 | COLORFUL AND BRIGHT DIAMOND - The present invention involves the field of jewellery products, and especially, relates to a colourful and bright diamond which comprises an even number of main crown facets and an even number of main pavilion facets. The colourful and bright diamond has a total reflection gross efficiency of two 90% and the optical performance which is 12 times more than the existing ordinary diamonds. | 03-05-2015 |
20150101365 | METHOD OF PROVIDING MARKINGS TO PRECIOUS STONES INCLUDING GEMSTONES AND DIAMONDS, AND MARKINGS AND MARKED PRECIOUS STONES MARKED ACCORDING TO SUCH A METHOD - An identifiable mark on a portion of a polished facet of a surface of an article and being identifiable by an optical magnifying viewing device, said identifiable mark comprising a nano-structure formed by a two-dimensional or a three-dimensional lattice of a plurality of discrete nanometer sized recessed or protruded entities, wherein said entities are arranged within a predefined region of said polished facet in a predetermined arrangement in relation to each other and such that an outer interface surface between the facet of the article and air is formed and an inner interface surface between the facet of the article and air is formed. Said predetermined arrangement of said entities is non-uniform and non-periodic arrangement, and wherein said entities are sized and shaped so as to cause optical scattering upon reflection of incident light and the distance from the inner interface surface to the outer interface surface is greater than the amplitude of the non-marked portion of said polished face. Upon reflection of incident light having one or more predetermined wavelengths by said lattice at a predetermined angle of incidence to said lattice, interference due to scattering of light from said lattice is induced such that said reflected light has a variation in intensity providing one or more local maxima of one or more wavelengths. Said mark is identifiable by way of an optical magnifying viewing device inclined at a requisite viewing angle such that a local maxima is detected. | 04-16-2015 |
20150121960 | METHOD AND APPARATUS FOR MACHINING DIAMONDS AND GEMSTONES USING FILAMENTATION BY BURST ULTRAFAST LASER PULSES - A non-ablative laser machining method and apparatus for cutting facets of a diamond, using a material machining technique involving filamentation by burst ultrafast laser pulses well suited to mass production. Coupled with 3D modeling and the computerized laser machining system, complex geometric surfaces can be created on the diamond. The facets of the diamond need not be planar in configuration, and may incorporate acute as well as oblique angles. This method minimizes the need for diamond polishing, speeds up production, and realizes great reductions in the quantity of lost material from the cutting process. | 05-07-2015 |
20150296934 | A DIAMOND WITH EIGHTY-ONE FACETS HAVING A TEN HEARTS AND TEN ARROWS INNER STRUCTURE - The present invention relates to a diamond with eighty-one facets having a ten hearts and ten arrows inner structure, it includes ten main crown facets and ten main pavilion facets; said diamond also has one table facet; crown star facets are provided at the junction of said main crown facets with the table facet, the number of said crown star facets is ten; crown small facets are provided at the junction of main crown facet edge with the crown star facets, the number of said crown small facets are ten; small sectors are provided at the junction of the main crown facets with the crown small facets, the number of said small sectors are twenty; the main pavilion facet auxiliary surfaces are provided at the junction of said main pavilion facets, the number of the auxiliary surfaces of said main pavilion facets is 20. The beneficial effect of the invention is that: by cutting the diamond into eighty-one facets and having the ten hearts and ten arrows inner structure, not only endowing the diamond with higher quality and value by an advanced cutting technology, but also improving the brilliance of the diamond under sunlight, and its brilliance can be improved by 20-30%. The diamond of the present invention has more brilliance. | 10-22-2015 |
20150305451 | NOVEL ARCHED GEMSTONE AND METHOD OF MANUFACTURE - A diamond, which has a step-cut arched configuration on one end and a baguette-style configuration on the other, comprising a girdle, a top or crown above the girdle, and a pavilion or base below the girdle. The crown terminates in an upper planar surface known as a “table,” which is generally parallel to the girdle plane. The arched end is comprised of step-cut crown facets that are preferably arranged about a common center, and upstanding pavilion facets that are also preferably arcuately arranged about the common center. The pavilion also includes a large, arched window facet. | 10-29-2015 |
20160066663 | CUSHION SHAPED HEARTS AND ARROWS GEMSTONE AND METHOD - A cushion cut diamond and method for polishing a diamond to form a cushion cut which will display a hearts and arrows pattern characteristic of the true hearts and arrows pattern in a round cut diamond when subjected to light. The cushion cut is formed by polishing a diamond into a symmetrical rounded shaped geometry having four curvilinear long sides and four curvilinear corner sides of equal radius with the four curvilinear corner sides interconnecting the four curvilinear long sides to form the rounded shape; forming 4 main crown facets of substantially equal geometry and dimension symmetrically positioned on the four long sides of the diamond with the 4 main crown facets on the four corner sides being equal in geometry and dimension and symmetrically positioned on the four corner sides and further comprising a table facet, 8 crown star facets on the main crown sides adjacent the table facet; 16 crown halve facets. surrounding the four long sides and four corner sides of the diamond; 8 main pavilion facets, 16 pavilion half facets, 4 subsidiary pavilion facets, 16 subsidiary pavilion half facets and multiple girdle facets on both the long and corner sides of the diamond with the girdle facets being of varying thickness wherein the hearts and arrows pattern generated by the cushion shaped diamond gemstone forms 8 perfectly symmetrical arrows and 8 perfectly symmetrical hearts when visually observed through a conventional scope in the presence of light. | 03-10-2016 |
20160120274 | Step-Cut Gemstone - A cushioned step-cut gemstone is disclosed. The gemstone may include a crown disposed above a girdle and a pavilion disposed below the girdle. The girdle may include twelve straight-edged facets defining four sides and four corners of the girdle, wherein the four sides each comprise one straight-edged facet and the four corners each comprise two straight-edged facets meeting at a corner midpoint. The crown may include a table and two or more rows of step-cut facets between the table and the girdle. The step-cut facets may include side step-cut facets shaped like elongated trapezoids and corner step-cut facets, and each step-cut row includes twelve step-cut facets. | 05-05-2016 |
20160166021 | ROUND CUT GEMSTONE EXHIBITING EXCELLENT OPTICAL BRILLIANCE | 06-16-2016 |
20180020790 | A DIAMOND WITH EIGHTY-ONE FACETS HAVING A TEN HEARTS AND TEN ARROWS INNER STRUCTURE AND A CUTTING METHOD THEREOF | 01-25-2018 |
20190142119 | FOUR-STONE SEAMLESS RADIANT CUT DIAMOND AND METHOD FOR MAKING THE SAME | 05-16-2019 |