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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 8069688 | 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. Altern... | 12/06/2011 |
| 8056363 | Method for producing a highly refractive composite gemstone, and product A method for providing a protective coating and enhanced optical qualities to a gemstone. The method includes coating a first portion and a second portion of a gemstone with TiO2 doped with calcium oxide (TiO2+). The TiO2+ coated gem... | 11/15/2011 |
| 8033136 | 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 diffrac... | 10/11/2011 |
| 7992410 | 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 inclu... | 08/09/2011 |
| 7971452 | 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 ... | 07/05/2011 |
| 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 seat and set therein, a bore extending axially between a culet of th... | 10/06/2009 |
| 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 characterized by at least two different color zones, where such two zones are of ... | 05/05/2009 |
| 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 to fuse the material on the girdles. The stencils can be eliminated,... | 07/15/2008 |
| 7326477 | Spinel boules, wafers, and methods for fabricating same A single crystal spinel wafer is disclosed, including a front face and a back face; and an outer periphery having first and second flats. In certain embodiments, the single crystal wafer has a specific crystallographic orientation, and the flats are provided to exte... | 02/05/2008 |
| 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 provided in the form of a slab, faceted gemstone, or cabochon. ... | 11/06/2007 |
| 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 initiated by exposing naturally-occurring internal defects or impurities i... | 10/23/2007 |
| 7269973 | Eternity band with U-shaped seats for gemstones An eternity band having a multi-stone circular setting in combination with gemstones or diamonds. The circular setting includes a plurality of U-shaped seats being connected in series to form a circular configuration; and each of the U-shaped seats form a seating ar... | 09/18/2007 |
| 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 girdle, a crown above the girdle and a pavilion below the girdle. A girdl... | 07/31/2007 |
| 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 shifted approximately fifteen degrees from the ridge of the raw diamond ... | 06/12/2007 |
| 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 human and animal parts or deceased human or animal parts into the diamond... | 06/12/2007 |
| 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 girdle, bezel and star facets are at significantly angles of inclination... | 06/05/2007 |
| 7225641 | 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 girdle, a crown above the girdle and a pavilion below the girdle. A girdl... | 06/05/2007 |
| 7192337 | Method for cutting diamond To provide a diamond rendering reflective light off a table goldenly brilliant by making a proportion thereof symmetrical at any place viewed from an upper face, a side face or a bottom face, a first reference line, a second reference line crossing the first referen... | 03/20/2007 |
| 7162891 | Piece of jewelry with stone A piece of jewelry includes a foundation for mounting at least one stone. The stone is at least regionally inserted in a depression of the foundation of the piece of jewelry. At least one securing element is arranged for the stone, in the area of the foundation. The... | 01/16/2007 |
| 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 100 μm, or has a volume exceeding 1 mm3, or a combination... | 01/09/2007 |
| 7154928 | Laser output beam wavefront splitter for bandwidth spectrum control Apparatus/method providing bandwidth control in narrow band short pulse duration gas discharge laser output light pulse beam producing systems, producing a beam comprising pulses at selected pulse repetition races, e.g., comprising a dispersive bandwidth selection o... | 12/26/2006 |
| 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 shaped facets and the girdle break is cut with triangular and quadrila... | 12/12/2006 |
| 7140200 | Article of jewelry An article of jewelry including a body having an outer major surface and a decorative pattern formed on the outer surface of the body, and a method for forming the decorative pattern, the pattern including pairs of intersecting grooves and an optically transparent s... | 11/28/2006 |
| 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 a body color that appears substantially constant at different angles... | 11/21/2006 |
| 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 provided a layer of single crystal CVD diamond of high quality having a... | 10/31/2006 |
| 7088758 | Relax gas discharge laser lithography light source An apparatus and method are disclosed for operating a narrow band short pulse duration gas discharge laser output light pulse beam producing system, producing a beam comprising laser output light pulses at a selected pulse repetition rate, which may comprise: a disp... | 08/08/2006 |
| 7033037 | Dazzling light device A dazzling light device includes a shell, a gem stone and one or several lighting members. The shell comprises a holding section to hold the gem stone therein. The lighting member shines light to the gem stone which then refracts or reflects light from various angle... | 04/25/2006 |
| 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. ... | 03/14/2006 |
| 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 four pairs of edges are spaced by roughly equal spacing D1... | 02/21/2006 |
| 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 a body color that appears substantially constant at different angles... | 02/14/2006 |
| 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 volume as compared to the current standard Ideal Cut. ... | 01/31/2006 |
| 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 detector for detecting a break in the contact; and an emitter for emitting... | 08/16/2005 |
| 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 from each side of the square or rectangular table to define the four low... | 07/12/2005 |
| 6913009 | 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 from each side of the square or rectangular table to define the four low... | 07/05/2005 |
| 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 upper pavilion (UP) facets below the crown facets at an angle of betwee... | 05/17/2005 |
| 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 reflection ray amount. In the rectangular brilliant-cut diamond, the bezel ... | 11/16/2004 |
| 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 table, which is surrounded by eight triangular star facets. Eight tabl... | 07/13/2004 |
| 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 4 facets, and a crown with 33 facets (including the table). ... | 06/08/2004 |
| 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 between opposite surfaces of the rear of the stone (1) is mor... | 03/16/2004 |
| 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, and 32 upper triangular facets. The girdle and table may be ... | 03/02/2004 |
