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7596967 |
Encrusted diamond
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...
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7526928 |
Multi-color gemstones and gemstone coating deposition technology
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...
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7398658 |
Gemstone marking system and method
Diamonds are marked by applying apertured stencils bearing identifying indicia to the girdles, applying a fusible coating material over the apertured stencils, and then heating the coating material...
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7290404 |
Gemstone material
The invention provides a gemstone material having therein embedded a plurality of dichroic particles. Methods of producing the gemstone material are also provided. The gemstone material can be...
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7284396 |
Method and system for laser marking in the volume of gemstones such as diamonds
A method and an apparatus for laser marking indicia in the volume of gemstones such as diamonds, the indicia being made up of a plurality of microscopic dot-shaped marks whose build-up can be...
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7251619 |
Computer implemented method, computer program product, and system for gem evaluation
System and method for providing a gem assessment based upon proportional parameter values relating to the proportions of a gem, such as a diamond. A gem cut quality rating is provided. The system...
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7249471 |
Cut design of diamonds providing plenty of visual-perceptible reflection for ornamental use and observation method thereof
A cut design of an ornamental diamond and an observation method of the diamond which an observer can perceive a more beauty, are disclosed. The cut design is a round brilliant cut comprising a...
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7228856 |
Diamond cutting method and diamond provided by the method
Ten of pavilion main facets are formed with reference to the previously formed five of first pavilion main facets in which an initial first main facet is formed in a position centered on a line...
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7228602 |
Method of encapsulating material from humans or animals in a natural gemstone and its product
A method of creating a diamond includes the steps of creating entry points and internal passages in a natural or synthetic diamond, infiltrating a mixture comprising ashes produced from living...
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7225642 |
Diamond cut
A brilliant gemstone cut, having a crown, a girdle and a pavilion. The crown has a flat table shaped as an equilateral n-sided polygon. The girdle is also multi sided polygon. The corner, lower...
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7160617 |
Boron doped diamond
A layer of single crystal boron doped diamond produced by CVD and having a total boron concentration which is uniform. The layer is formed from a single growth sector, or has a thickness exceeding...
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7146827 |
Mixed cut gemstone
A mixed cut gemstone comprising a girdle, a crown above the girdle and a pavilion below the girdle. The crown has a girdle break, a table break and a table. The table break is cut with triangular...
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7137275 |
Coatings for gemstones and other decorative objects
The invention provides a decorative object comprising a transparent or translucent substrate having a body and at least one surface bearing a thin film coating. The coating imparts in the substrate...
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7128974 |
Thick single crystal diamond layer method for making it and gemstones produced from the layer
This invention relates to diamond and more particularly to diamond produced by chemical vapour deposition (hereinafter referred to as CVD). According to a first aspect of the invention, there is...
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7062940 |
Carved pearl
A pearl including a nucleus optionally including a gem and a nacre coating. The nacre coating partially coats but does not fully coat the nucleus thereby exposing at least a portion of the nucleus.
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7010938 |
Microinscribed gemstone
A microinscribed gemstone such as a diamond is inscribed by a laser beam to graphitize a surface portion of the gemstone without damaging a bulk portion.
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7000607 |
Gemstone and corresponding method of cutting
A gemstone having a crown, a girdle and a pavilion, wherein the girdle is shaped such that, when viewed in plan view, it is primarily bounded by four pairs of parallel straight edges. Three of the...
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6997014 |
Coatings for gemstones and other decorative objects
The invention provides a decorative object comprising a transparent or translucent substrate having a body and at least one surface bearing a thin film coating. The coating imparts in the substrate...
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6990833 |
Faceted circular cut diamond
A circular cut diamond, with appropriate dimensions, to greatly enhance the brilliancy, scintillation, and dispersion of a circular cut diamond and to produce a larger-looking diamond per unit...
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6928834 |
Jewellery setting
The invention provides a setting for a precious stone comprising a support for a precious stone; contact means for establishing a contact between the support and a stone within the support; a...
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6915663 |
Diamond cutting method, enneahedral-cut diamonds and assembly of enneahedral-cut diamonds
Disclosed is a diamond cutting method comprising the steps of: forming a square or rectangular table in a piece of gemstone; and forming a pavilion continuous to the table by cutting vertically...
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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...
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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...
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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...
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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 of...
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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...
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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,...
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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...
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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 time...
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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...
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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...
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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,...
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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...
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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°...
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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...
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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 a...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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