The present disclosure is directed to a gemstone including an image formed by one or more facets cut into an upper portion of the gemstone. The gemstone further includes one or more upper light injectors cut into the upper portion of the gemstone. The one or more upper light injectors are angled to direct light towards the image. The gemstone also includes one or more lower light injectors cut into a lower portion of the gemstone. The one or more lower light injectors are angled to direct light towards the image.

Presented is a diamond comprising a table, a crown, a girdle, a pavilion, and a culet. The table is rectangular, having a length and a width. The table comprises a first side, adjacent to a second side, adjacent to a third side, and adjacent to a fourth side. The first side of the table is directly connected with a first facet of the girdle. The second side of the table is directly connected with a second facet of the girdle. The crown comprises a plurality of facets connecting the third side and the fourth side of the table to the girdle. The pavilion is connected to the girdle. The culet is positioned directly below a point having a 1% deviation from the center of the girdle.

The present invention is a novel technique for setting a multiplicity of diamonds such as diamonds into a unique setting to enhance the beauty and presentation, with the technique including steps of assorting, blocking, mapping, sawing, polishing, assembling and grooving of assembling of white, naturally colored and treated color natural diamonds. The present invention provides method where each diamonds is separately processed for ultimate brilliance and cumulative refraction. The flat surfaces of the adjacent diamond are joined to form the complete design in the system. The assembled diamonds are arranged by grooving and providing support to form final pattern of the jewelry. The present process is advantageous with regards to usage of maximum utilization of raw diamond and process that gives great brilliance of large diamond and expensive appearance to user.

The invention relates to the field of jewelry, specifically to a diamond with eighty-one facets having a ten hearts and ten arrows inner structure and a cutting method thereof. The diamond comprises a table facet, ten main crown facets and ten main pavilion facets; a crown star facet is disposed at a junction of two adjacent main crown facets with the table facet; a crown small facet is disposed at a junction of two adjacent main crown facets with the crown star facet; a small sector is disposed at a junction of the main crown facet with the crown small facet; and two main pavilion facet auxiliary surfaces are disposed at a junction of two adjacent main pavilion facets. The cutting method comprises a division of a pavilion, a crown and a girdle, the pavilion cutting and the crown cutting. The shaped diamond has very good brilliance, fire and sparkle.

A diamond bow tie grading system including a structured lighting environment, and an ability to view a diamond at different tilt angles, using the views to find a transition angle where a dark area on the diamond brightens and assigning a bow tie rating using the transition angle. The diamond bow tie grading system may have an observation enclosure with an interior, a gemstone-seat for holding a diamond, located inside the interior of the observation enclosure, a viewport located on the observation enclosure that provides a view of the gemstone-seat, and a tilt angle readout that provides a tilt angle. The interior around the viewport is a dark circle representing an angle of obscuration. The diamond bow tie grading system may include a gemstone-seat manipulator that changes the tilt angle. The viewport may have two viewport openings to provide binocular vision to an observer.

Emerald-cut diamond with length/width of 1.35 to 1.40; table of 55 to 60 percent; corner ratio of 13.5 to 14.5 percent; girdle thickness up to 3 percent; crown main angle of 28 to 45 degrees; first crown break angle of 2 to 6 degrees; second crown break angle of 2 to 6 degrees; pavilion main angle of 43 to 48 degrees; first pavilion break angle of 2 to 5 degrees; and second pavilion break angle of 2 to 5 degrees. Diamonds cut in accordance with these parameters may have light performance 0-grade domains on a grade map with wide crown and pavilion mains ranges. A method cuts the diamond according to the parameters, and may include selecting crown and pavilion main angles from the map, and cutting the diamond sufficiently close to the selected cutting parameters to obtain the light performance grade of 0.

The invention relates to a gemstone including a crown having a multiplicity of crown facets and a table, a girdle, and a pavilion having a multiplicity of pavilion facets, wherein a crown angle is between 34.5 and 35.5, and is preferably 35, and a pavilion angle is between 40 and 41, preferably between 40.2 and 40.8, and is particularly preferably 40.5.

The invention is directed to shallow pavilion, cut diamonds having excellent optical characteristics. The pavilion surface includes a plurality of substantially planar main pavilion facets, each of which extend from the girdle to a pointed culet defining the bottom most portion of the cut diamond. The crown angle is in the range of between about 29 degrees to about 36 degrees, and the pavilion angle is in the range of between about 15 degrees and about 34.5 degrees. The shallow pavilion, cut diamonds of the invention may be either round shaped cut diamonds orfancy shaped cut diamonds.

A gemstone, and a method for cutting a gemstone, such that the resulting gemstone has a total depth percentage of between 38-55% but still provides for a brilliant cut without having face main facets intersect a cullet.

A gemstone includes a crown, a pavilion, and a girdle disposed between the crown and the pavilion. The girdle has an elliptical cross-section with a major axis and a minor axis. The surface of the gemstone is generally divided into a number of groups of interlocking facets disposed at a variety of angles. The groups of facets comprising the surface of the crown generally include star facets, upper intermediate crown facets, lower intermediate crown facets, main crown facets, and upper girdle facets. The upper girdle facets generally abut an upper edge of the girdle. The groups of facets comprising the surface of the pavilion include culet-adjacent facets, candle facets, main pavilion facets, and lower girdle facets. The lower girdle facets generally abut a lower edge of the girdle.