Matches 1 - 50 out of 140 1 2 3 >


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US20120180525 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...
US20110302960 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...
US20120227444 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...
US20150201720 CUT FOR GEMSTONE  
The invention relates to a gemstone (1) having a chaton cut, in which a crown (2) adjoins a flat table (5) and has facets (11, 12, 13) that are inclined downwardly relative to the table (5) all...
US20150173469 CUSHION CUT GEMSTONE WITH EXCELLENT OPTICAL BRILLIANCE  
A gemstone including a substantially rectangular girdle with rounded corners, a crown extending in a first direction from the girdle, and a pavilion extending in a second direction from the girdle...
US20140033765 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;...
US20150020544 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...
US20120079853 GEM WITH BRILLIANT CUT  
Brilliant-cut gemstone, wherein the crown angle (α) is between 32.8° and 33.0°.
US20120024010 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...
US20110252830 INVISIBLE SETTING FOR GEMSTONES  
A gemstone comprising: a girdle in which at least one groove or notch is formed;a faceted pavilion on one side of the girdle; anda crown on a second side of the girdle.
US20120024009 MULTI-FACETED GEMSTONE FOR MULTI-STONE JEWELRY ITEM  
A gemstone having a crown which includes a multi-faceted crown surface and planar opposed side facets. The multi-faceted crown surface is arcuate from the front to the back of the crown. The...
US20150052946 DECORATIVE JEWELRY AND METHODS OF MAKING SAME  
An article of jewelry includes a stone having a viewing surface and a back surface and epoxy. The stone preferably is transparent or translucent in that it preferably internally and externally...
US20150007610 ORNAMENTAL DEVICE COMPRISING A STONE  
The invention relates to an ornamental device (1) comprising at least one cut or polished stone (2) with at least one rear portion (23). This ornamental device (1) is characterised by 5 the fact...
US20120297826 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...
US20150052947 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...
US20140116088 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...
US20120060557 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...
US20140047867 Brazed Joint for Attachment of Gemstones to Each Other and/or a Metallic Mount  
The specification relates to a gemstone setting. The gemstone setting includes a gemstone, a mounting surface and a braze joint. The braze joint is formed from a reactive metallic alloy with the...
US20110146349 GEMSTONE AND METHOD FOR CUTTING THE SAME  
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)...
US20130239615 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...
US20120103016 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...
US20110146350 ROUND BRILLIANT CUT GEMSTONE AND METHOD FOR CUTTING THE SAME  
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...
US20090260396 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...
US20110239705 DECORATIVE JEWEL AND METHOD FOR CUTTING DECORATIVE JEWEL  
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...
US20090178438 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...
US20140075991 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...
US20110302959 Precious stone setting  
The object of the present invention is a setting for a gemstone or diamond having a groove cut, based on gemstone or diamond shape, which acts as the setting. The groove in the gemstone or diamond...
US20110016918 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...
US20080271486 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...
US20120266631 SETTING FOR GEMSTONES, PARTICULARLY DIAMONDS  
A setting for a gemstone including a girdle, a crown on one side of the girdle, and a pavilion on the opposite side of the girdle, characterized in that the setting mounts the gemstone in an...
US20080271485 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,...
US20130291587 INVISIBLE SETTING AND METHODS AND TOOLS FOR EFFECTING SAME  
A mounting holds a grooved gemstone invisibly to a setting. One end of the mounting has arms or extensions to receive the gemstone and protrusions extending inwardly from the arms to fit in the...
US20110296873 MULTI-COATED METALLIC ARTICLES AND METHODS OF MAKING SAME  
Provided is a jewelry ring comprising a substrate, a first coating of a metallic nitride or a metallic boride, and an external metallic coating. Also provided is a metallic article comprising a...
US20120006056 Gemstone Arrangement  
A gemstone arrangement that allows ambient light entering a primary gemstone through a pavilion to be directed out a crown at a desired location and angle is described. Ambient light is directed...
US20080271488 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...
US20120291487 GEMSTONE OF NATURAL DIAMOND AND METHOD APPLIED THERETO  
Gemstone of natural diamond, characterised in that the gemstone (1) has two parallel faces (2-3, 4-5) in which the geometric plane that coincides with the aforementioned faces defines the volume...
US20090229308 HIGHLY INCLUDED DIAMOND JEWELRY  
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...
US20110072851 DIAMOND JEWELRY  
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.
US20100326135 DIAMOND MATERIAL  
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...
US20080271487 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...
US20120240622 EMBEDDED GEM AND A METHOD FOR EMBEDDING A GEM  
An embedded gem and a method for embedding a gem are disclosed. An embedded gem includes a first gem and a second gem. The first gem includes a recess. The recess has an opening at the location of...
US20110265514 METHOD OF CUTTING DIAMONDS  
In a method of taking a star facet of a diamond and extending its length to the girdle (the outside perimeter) of the diamond, a shield style (obelisk-shaped) facet is produced in rounds and fancy...
US20110000259 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...
US20120096898 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...
US20130125585 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...
US20140352354 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...
US20070113586 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...
US20090038341 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...
US20070044510 Decoration stones  
Decoration stones are disclosed, which are capable of simply and easily obtaining a desired design effect in such a manner that a certain design is implemented based on a preliminary attachment...
US20140026616 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...

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