Abstract: A gemstone comprising: a girdle in which at least one groove or notch is formed; a faceted pavilion on one side of the girdle; and a crown on a second side of the girdle.

Abstract: 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.

Abstract: The color stone 1 is formed of a material with a refractive index n of 1.55 to 2.40, and is subjected to round brilliant-cutting. The pavilion angle p and the crown angle c satisfy the correlation of, ?A(n)×p+B(n)+K1?c??A(n)×p+B(n)+K2 where, A(n) is represented by A(n)=?1.122×n5+9.14×n4?26.752×n3+32.982×n2?12.842×n, B(n) is represented by B(n)=?22.323×n5+184.166×n4?527.616×n3+594.102×n2?128.68×n, K1 is represented by K1=+4, and K2 is represented by K2=?4.

Abstract: A jewelry item, piece of jewelry, and ornament having a rotating design element therein. In one illustrative embodiment, a piece of jewelry can include an ornamental element maintained within a housing unit. The housing unit can be made so that the ornamental element rotates along its horizontal axis. The piece of jewelry can also include a turning assembly, which can be located within the housing unit. The turning assembly can rotate the ornamental element along the horizontal axis defined by the housing unit. In another illustrative embodiment, a piece of jewelry having a rotating pinwheel is presented. The pinwheel can be rotated either horizontally or vertically. The piece of jewelry can include a body for retaining the pinwheel and a rotary element for spinning the pinwheel. The rotary element can be placed within the body.

Abstract: A jewelry piece is formed with a jewelry body made of epoxy material, defining an outer surface and cast in the shape of a piece of jewelry in the form of a ring, pendant, earring, brooch, bracelet, anklet, necklace, and the like. The epoxy has a material density approximating that of gold and the decorative metal layer made of precious metal is affixed to the outer surface of the jewelry body in a thickness greater than 0.125 ?m. The decorative body may be surface mounted to the jewelry or it may be inlaid or affixed in other similar fashion.

Abstract: A jewelry article with a gem invertedly set therein. A cut gem having a top and a bottom is set into the jewelry article in an inverted position such that the bottom of the cut gem faces out to be viewed when a user wears the jewelry article. The jewelry article may further comprise a plurality of cut gems and a center gem. The cut gems are invertedly set into the jewelry article and arranged around the center gem such that the jewelry article has a substantially star shape when the jewelry article is viewed from above.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a gemstone (10) comprises a girdle (13), a crown (11) and a pavilion (12). The crown (11) comprises a table (14), eight star facets (15) surrounding the table (14), eight first half facets (16) aligned between the star facets (15), eight second half facets (17) aligned adjacent to the first half facets (16) and sixteen upper girdle facets (20) aligned between the second half facets (17). The pavilion (12) comprises sixteen pavilion main facets (23) and sixteen lower girdle facets (25) aligned between the pavilion main facets (23). The invention also relates to a method of cutting the gemstone.

Abstract: The invention relates to a gemstone (10) comprises a girdle (13), a crown (11) and a pavilion (12). The crown has a table (14), ten star facets (15) surrounding the table, ten bezel facets (16) aligned between the star facets and twenty upper girdle facets (20) aligned between the bezel facets. The pavilion is provided with ten pavilion main facets (24), twenty pavilion hook facets (29) aligned between the pavilion main facets and ten pavilion star facets (34) aligned between the pavilion hook facets. The invention also relates to a method of cutting the gemstone.

Abstract: The dial with an enamel coating (2) includes a base plate (1) made of ceramic material with portions in relief (4, 8) obtained by partial or through shaping or machining, formed by an insert (10) also having an enamel coating (12) and whose thickness defines a recess (4) or an embossment (8).

Abstract: A diamond band made from solid diamond can be worn on a body part. Various pieces of jewelry are made from a diamond such as a plate of chemical vapor deposition formed diamond.

Abstract: A diamond layer of single crystal CVD diamond which is coloured, preferably which has a fancy colour, and which has a thickness of greater than 1 mm.

Abstract: 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.

Abstract: A layer of single crystal CVD diamond of high quality having a thickness greater than 2 mm. Also provided is a method of producing such a CVD diamond layer.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A method of making fancy orange synthetic CVD diamond material is described. The method comprises irradiating a single crystal diamond material that has been grown by CVD to introduce isolated vacancies into at least part of the CVD diamond material and then annealing the irradiated diamond material to form vacancy chains from at least some of the introduced isolated vacancies. Fancy orange CVD diamond material is also described.

Abstract: A jewelry setting for gemstones, including cabochons, faceted stones, or other stones, pearls, wood cabochons, or other decorative objects, having a mounting ring and multiple rear-mounted retaining arms is disclosed. A method for assembling a jewelry setting is also disclosed. The decorative object may be inserted through the rear of the mounting ring. The mounting ring has a diameter that is slightly smaller than a diameter of the decorative object, thus preventing the decorative object from passing completely through the mounting ring. The retaining arms may be bent inward and tightened against the decorative object, thus securing the decorative object within the setting.

Abstract: The invention relates to a jewelry item including several spherical or near-spherical elements (hereinafter spherical elements) in which each spherical element (1) includes at least one bore (2) and is connected to at least one adjacent spherical element (1). The assembly of two adjacent spherical elements (1) is carried out using a rod (3) inserted on either side into the corresponding bore (2) of each spherical element (1). A plurality of spherical elements (1) each include at least two bores (2), wherein the axis of each bore (2) extends radially relative to the centre of the spherical element (1). The spatial positioning of adjacent spherical elements (1) on either side of a common spherical element (1) is achieved by the angular orientation in space of the bores (2) relative to each other. The assembly of each adjacent spherical element (1) to the common spherical element (1) is achieved by inserting or screwing each rod (3) on either side into the corresponding bores (2).

Abstract: A jewelry piece is formed with a jewelry body made of epoxy material, defining an outer surface and cast in the shape of a piece of jewelry in the form of a ring, pendant, earring, brooch, bracelet, anklet, necklace, and the like. The epoxy has a material density approximating that of gold and the decorative metal layer made of precious metal is affixed to the outer surface of the jewelry body in a thickness greater than 0.125 ?m. The decorative body may be surface mounted to the jewelry or it may be inlaid or affixed in other similar fashion.

Abstract: Gemstone (1) having a back (2) tapering to a tip (3), and a front which is cut in a faceted manner (5), wherein regions opposing said tip (3) being mirrored (12).

Abstract: 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.

Abstract: A sequin (4), comprising a carrier layer (1), a gemstone (2, 3) or a plurality of gemstones (2, 3) being arranged on one side of the carrier layer (1).

Abstract: 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.

Abstract: A device for displaying time, in particular a wrist watch, comprising a plurality of gemstones and a plurality of illumination elements which are arranged on or at a carrier and via which the gemstones can be selectively illuminated or have light shone through them in order to display the time, wherein each gemstone being respectively held in its own mount protruding from the carrier.

Abstract: A method for producing precious or semi-precious stones comprising the following steps is described: cutting and polishing of a rough crystal (1) so as to obtain a polyhedron of cut crystal (2); gluing together of at least four polyhedrons (2) of cut crystal so as to obtain a larger polyhedron (4); and cutting of the polyhedron (4) of glued crystals so as to obtain a finished precious or semi-precious stone (6).

Abstract: A cut gemstone has one or more backside grooves cut into backside facets to form sub facets that operate to increase the brilliance of the cut gemstone.

Abstract: A novel gemstone cut that has 162 facets such that the crown has 65 separate facets and the pavilion has 97 separate facets.

Abstract: A system is provided for certifying two or more gemstones as being a matched pair. The system includes measuring values for at least four physical properties of a multiplicity of gemstones, identifying a first gemstone, a second gemstone, and optionally still further gemstones all being within match tolerances of the respective measured values, and certifying in a single certificate that based on the match tolerances, the gemstones constitute a matched set. Also disclosed is jewelry and a process for creating jewelry based on the certification system.

Abstract: Jewelry containing at least one stone being specifically cut for replicating a shape of a country of origin of a wearer. The jewelry includes a setting and a stone. The stone is set in the setting, and is specifically cut for replicating the shape of the country of origin of the wearer of the article of jewelry.

Abstract: 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.

Abstract: An encrusted gemstone comprising a base diamond having a crown with a table surface, a pavilion, and a recessed seat in the table surface, an insert diamond having a pavilion matching said recessed seat and set therein, a bore extending axially between a culet of the base diamond and the recessed seat thereof, and a shaft received within said bore, said shaft having a proximal end projecting into the recessed seat and formed with an insert retaining portion, and a distal end projecting from the culet and provided with a securing arrangement.

Abstract: A jewelry article having a highly included gemstone is set into a jewelry setting with a layer of black rhodium coated onto the top surface of the jewelry setting such that the layer of black rhodium is located adjacent the pavilion and below the crown of the highly included gemstone. The layer of black rhodium at least partially absorbs light reflected or refracted inside the pavilion and into the table of the gemstone.

Abstract: 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.

Abstract: 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 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.

Abstract: 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.

Abstract: The invention provides a gemstone or a decorative object having at least one surface bearing a thin film coating. In some embodiments, there is provided a gemstone having an appearance characterized by at least two different color zones, where such two zones are of different colors. In other embodiments, two different areas of a single (e.g., integral, one-piece) gemstone carry coatings of different composition, and the resulting appearance of the gemstone is characterized by the stone exhibiting substantially a single uniform body color that is different than the body color the stone would exhibit if it were coated only with one or the other of the coatings. Also provided are new deposition techniques.

Abstract: A gemstone can include a crown portion having a table facet, a plurality of trapezoidal facets, a plurality of irregular-hexagonal facets, a plurality of irregular-pentagonal facets, and a plurality of triangular crown-facets. The gemstone can also include a pavilion portion having a plurality of first kite facets, a plurality of irregular-quadrilateral facets, a plurality of second kite facets, and a plurality of triangular pavilion-facets.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Various embodiments of the invention relate to a method for making an article of jewelry, the method may comprise, but is not limited to, mixing zirconia and a binder to form a mixture, heating the mixture, applying a pressure to the mixture to place the mixture in a mold to form a molded body, and applying heat to the molded body in a controlled atmosphere to at least partially remove the binder from the molded body. The method may further comprise forming at least one hole extending completely through the molded body, the at least one hole for inserting at least one stone setting or a housing for the stone setting.

Abstract: The invention concerns a precious, semi-precious or mineral cut stone, comprising a crown (1) including in its center a planar table (2) surrounded with several facets of the crown (3-5), a pavilion (6) comprising a pointed culet (8) and several pavilion facets (9-12 and 17), and between the crown (1) and the pavilion (6), a girdle (7). The invention is characterized in that said pavilion facets comprise at least one top facet (9-12) extending between said pointed culet (8) and an intermediate location (13-16) between the girdle (7) and the culet (8).

Abstract: The present invention includes gemstone settings and methods of manufacturing gemstone settings including a primary gem capable of displaying a plurality of images corresponding to one or more objects placed within in a focal region outside of the primary gem. The plurality of images is displayed by flattening the bottom of the primary gem and faceting the crown to specifications that allow light to pass through the gem and not substantially reflect against a faceted pavilion.