Matches 51 - 100 out of 233 < 1 2 3 4 5 >


Match Document Document Title
6892720 Method for cutting natural and/or man-made diamonds  
A method for producing a diamond includes forming a table lying in a table plane; forming crown facets that are oriented at an angle of between 26° and 35° relative to the table plane; forming...
6818280 Rectangular brilliant-cut diamond  
A diamond is provided which is subjected to an improved rectangular brilliant-cut producing a facet configuration having an optimal shape for the purpose of increasing the visual-perceptible...
6761044 Gemstone cut  
A novel gemstone cut comprising a crown, a girdle, and a pavilion, wherein the gemstone includes precious gemstones (such as diamonds) and semi-precious gemstones. The crown includes an octagonal...
6745596 Princess cut diamond  
A princess cut gemstone having a pavilion, a girdle, and a crown. In the presently preferred embodiment, the princess cut gemstone is a diamond with 101 facets: a pavilion of 64 facets, a girdle...
6705114 Decorative stone made of glass  
A decorative stone made of glass is provided with a facetted front and a mirrored rear converging from the periphery of the stone to a point provided with an adhesive (10), wherein the angle...
6698239 Brilliant cut diamond  
A brilliant-cut gemstone having a pavilion, girdle, and crown is disclosed. The pavilion of the gemstone has 56 facets: specifically, 8 lower diamond-shaped facets, 16 middle kite-shaped facets,...
6694778 Cut design of diamond for ornamental use  
A cut design for diamonds having a crown of substantially a frustum shape and substantially a conic pavilion directly under the frustum part, the diamond being enhanced in the brilliancy and...
6668585 Multi-faceted combined cut gemstones  
The multi-faceted combined cut gemstone has the most facets in the history of gemstones. The King David cut with 104 facets makes the most brilliant, sparkling and eye-pleasing gemstone at the...
6649009 Process for placing one faceted stone inside a larger faceted stone to form a single jewelry stone  
A decorative jewelry stone and process for developing the stone. The process includes providing a primary stone and defining a cutting plane on the primary stone. The primary stone is then cleaved...
6635309 Process for the color enhancement of gemstones  
In accordance with the present invention, there are provided methods for enhancing the color of gemstone(s) by subjecting a combination of a gemstone and at least one finely divided form of a...
6615611 High yield diamond  
A high yield diamond and method of producing same. The diamond includes a plurality of main crown facets adjacent a table lying at an angle of between 23° and 40° relative to the table, a girdle,...
6604382 New-cut diamond shape  
Disclosed are a new diamond cutting method and a diamond shape or proportion giving an increased brightness and different brilliant colors to the cut jewel. A piece of diamond having a crown or...
6591827 Method for preparing a diamond  
A method for preparing a diamond having a six-pointed-star shaped girdle comprising: (1) providing a round diamond; and (2) grooving six equally spaced, equally-sized triangularly-shaped 120°...
6578380 Hexagonal brilliant cut diamond  
A gemstone having a crown and a pavilion, spaced by a girdle, has an overall hexagon configuration, the signature of the stone. Facets are cut in the crown of the stone defining an hexagon table...
6553786 Jewelry design employing fluorescent diamonds to create a hidden message  
A jewelry design including a mounting made of a precious jewelry metal, a plurality of fluorescent diamonds having at least medium blue fluorescent intensity which are set in the mounting to form...
6519972 Multi-stone oval gemstone assembly  
An assembly of gemstones which fit together to form a unitary shape is provided. The stones preferably make up an oval and are preferably four in number. Two of the stones are smaller than the...
6499314 Decorated pearl with integrated ornamental element  
The invention relates to natural or artificial pearl in which one or more ornamental elements (4) are inserted in form of an inlay with or without a mount, wherein the outer visible top or...
6493912 Stone setting methods  
A method of producing stone set jewelry includes the step of forming at least one affixation groove within the stone to be set in the jewelry. A stone to be set with the present method should have...
6474102 Method for determining a high-reflection cut of a gem, method for cutting a high-reflection gem, and the cut high-reflection gem  
The invention relates to a method for determining a high-reflection cut of a gem, a method for cutting a high-reflection gem, and a cut high-reflection gem. According to the invention, the gems...
6434805 Method of making a heart-shaped diamond  
A heart shape diamond and setting therefore including a first diamond section formed by cutting a first pear-shaped diamond along a first cutting plane to define a first mating surface and a first...
6422039 Gem  
A gemstone has a faceted crown which is inclined with respect to the main axis and which is defined on the one end by a preferably flat table and on the other hand by a peripheral edge of the...
6405562 Cut gem, in particular cut diamond  
The cut gem, in particular the diamond, has a predetermined number of cut facets in the crown (10) and in the pavilion about a central axis of geometric symmetry. The facets (25 to 27) are...
6397832 Diamond cutting method and new-cut diamond shape  
Disclosed are a new diamond cutting method and a diamond shape or proportion giving an increased brightness and different brilliant colors to the cut jewel. A piece of diamond having a crown or...
6391215 Diamond marking  
An information mark invisible to the naked eye is applied to the polished facet of a diamond gemstone by coating the diamond gemstone surface with an electrically conductive layer so as to prevent...
6378335 Common faceting for individual stones of a composite of diamonds  
A composite stone is formed of individual stones in which the faceting of the stones as viewed from the top is substantially identical. Providing a uniform faceting for each of the individual...
6358427 Marking diamond  
An invisible information mark is provided on a facet of a diamond gemstone by applying a plasma resist to the exposed surface of the gemstone, applying an electrically conducting layer of metal to...
6292315 Gem identification viewer  
A gem identifying device using filtered transmitted light for use in distinguishing type-I colorless diamonds from type II colorless diamonds, and natural diamonds and gems from synthetic or...
6227006 Wear-resistant bracelet  
The links (8) forming the bracelet (6) are articulated one after the other via cylindrical bars (9), these bars and links being held together by a flexible tie (10). The link (8) is made of a...
6200917 Colorless silicon carbide gemstones  
Large single crystals of silicon carbide are grown in a furnace sublimation system. The crystals are grown with compensating levels of p-type and n-type dopants (i.e., roughly equal levels of the...
6197428 Gemstones and decorative objects comprising a substrate and an optical interference film  
An article useful as a gemstone or decorative object. A formed substrate is used as a base for an optical interference coating applied on the exterior of the substrate. The optical interference...
6158243 Butterfly gem  
A cut stone having a crown (21) and a pavilion (23), the crown having peripherically four indents orientated face to face and forming a cross, the apparence of the crown of the stone forming a...
6145341 Uniquely mating jewelry items made from gems  
A uniquely mating jewelry item includes a first stand-alone jewelry piece including a first gem part which has been cut along a separation line from a gemstone, the first gem part having a first...
6146723 Enhanced gem stone and a method of simulating the appearance of an expensive gem stone  
A clear crystalline faceted substrate is provided with a coating of a colored transparent ink in order to enhance the appearance of the otherwise inexpensive gem stone. The ink is a permanent type...
6065307 Corner cut precious square stones  
A combination precious or semi-precious stone setting is formed utilizing princess or square cut stones having their edges lopped off, with at least two of the stones joined edge to edge forming a...
6048813 Simulated diamond gemstones formed of aluminum nitride and aluminum nitride: silicon carbide alloys  
Simulated diamond gemstones are produced by faceting and polishing bulk single crystals of colorless synthetic aluminum nitride or aluminum nitride:silicon carbide alloys.
6029474 Polished gemstone  
A gemstone, on which respectively at least four facets of equal size have been cut in the upper part and the lower part above and below the girdle plane, which have a parallel base edge, wherein...
6006548 Facet cut structure for gemstones to enhance brilliance  
A new structure for a colored gem, generally round or oval, in which a barrel cut is employed, but which has a center top edge and transverse boundaries which increases the thickness of the stone...
6000240 Jewels for live or artificial tooth or teeth  
A tooth or teeth jewels comprising highly clear gems such as diamond, zirconia, quartz, white sapphire or the like fixed as partially buried in a concavity formed in a live or artificial tooth or...
5882786 Gemstones formed of silicon carbide with diamond coating  
Synthetic gemstones are produced by growing single crystals of silicon carbide, fashioning the silicon carbide into gemstone cores, and thereafter depositing a thin coating of diamond on the core.
5868008 Ornaments using jewels  
A jewelry ornament includes a jewelry ring having a base having a hole formed in a central portion thereof. A prong mount extends from the base, and a transparent or semi-transparent gem is held...
5853826 Method of improving the color of transparent materials  
A faceted gemstone having at least one thin layer of material coated on the pavilion of a transparent substrate so that the body of the gemstone appears to have a different color. The color of...
5761929 Facet cut structure for colored stones to enhance brilliance  
A new structure for a colored gem, generally round or oval, in which a barrel cut is employed, but which has a center top edge and transverse boundaries which increases the thickness of the stone...
5760367 Apparatus and method of engraving indicia on gemstones, and gemstones, produced thereby  
Apparatus and methods for decorating a gemstone with colored indicia so that the indicia is readily visible from an exterior surface of the gemstone. The indicia is engraved on an predetermined...
5722261 Torous ring gemstone and method for making same  
A method for cutting and faceting a gemstone to provide a torus ring shape and gemstone provided thereby. A complete or partial torus is generated having a hole bored in the center through the...
5723391 Silicon carbide gemstones  
Synthetic gemstones having extraordinary brilliance and hardness are formed from large single crystals of relatively low impurity, translucent silicon carbide of a single polytype that are grown...
5713219 Invisible setting for precious stones for jewelry  
A diamond having a girdle with oppositely located flattened portions is disclosed. Each of the flattened portions has a cut-out with sloped walls. The girdle preferably has facets at its...
5657646 Jewel having multiple culets  
A gem cut with crown facets and base facets has a table and a principal culet located along the longitudinal axis of the gem. In addition, at least one additional culet is provided between the end...
5657647 Cut diamond  
A diamond without plate is described, in which the facets of the upper part are more slanted toward the girdle level than the facets of the lower part. To create a diamond that, with the least...
5649434 Invisible setting for round diamonds  
A round diamond having a girdle with oppositely located flattened portions is disclosed. Each of the flattened portions has a cut-out with sloped walls. The girdle preferably has facets at its...
5622063 Star-shaped precious stone mounting  
A jewelry piece includes a mounting for precious stones, the mounting being multi-pointed, star-shaped. The star-shaped mounting defines a plurality of N compartments, and in each compartment...

Matches 51 - 100 out of 233 < 1 2 3 4 5 >