The specification relates to a jewelry setting. The jewelry setting includes a gemstone having a culet; a mounting rod having a culet-shaped indent; and at least one braze joint, the at least one braze joint being formed between the culet and the culet-shaped indent.

A light-emitting jewelry piece includes a gemstone, a head, and a mounting. The head is configured to interconnect the gemstone to the mounting. The mounting is arranged to secure the light-emitting jewelry piece to a person or a personal adornment.

Aspects of the invention may be directed to a method of creating a predetermined structure from a diamond bulk. In some embodiments, the method may include: irradiating the diamond bulk with at least one laser having a focal point at a predetermined location, the laser may create graphitization at locations where the focal point of the laser engages the diamond bulk; at least one of: moving the diamond bulk to be positioned with the focal point of the laser within the diamond bulk, and moving the at least one laser such that diamond bulk be positioned with the focal point of the laser, along at least one axis wherein the movement corresponds to a predefined scheme; removing of the graphite from the diamond bulk; and extracting the predetermined structure from the diamond bulk.

Provided is a gemstone growing device including: a first pipe; a second pipe disposed below the first pipe and connected to the first pipe; a third pipe configured to surround the second pipe; a mixed material input part disposed in the first pipe; an oxygen input pipe connected to the first pipe; a first hydrogen input pipe connected to the third pipe; and a muffle disposed below the third pipe.

Provided is a method for manufacturing a synthetic gemstone, which manufactures a synthetic gemstone from a body tissue separated from a person or an animal, the method including: extracting a biological material from the body tissue; preparing a mixed material by mixing the biological material with a gemstone material; and growing a synthetic gemstone on a crystal seed as a single crystal by melting the mixed material.

Methods, apparatus, and systems for fabricating diffractive structures on gemstones for high optical performance are provided. In one aspect, a method includes obtaining a plurality of gemstone characteristics of a gemstone, determining that the gemstone exhibits each of the plurality of gemstone characteristics within a respective predetermined range, identifying a diffractive structure setting associated with a combination of the respective predetermined ranges for the plurality of gemstone characteristics, and fabricating diffractive structures on the gemstone according to the diffractive structure setting.

Presented herein 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 includes 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 includes 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.

A gemstone is configured to yield a hearts and arrows pattern when subjected to light. The gemstone has a length, a width and a height. The gemstone includes a crown portion, a girdle and a pavilion portion. The crown portion has a height of about 10-14.5% of the length of the gemstone and has four sides and four corners where the four corners connect the four sides to each other. The crown portion includes an octagonal table facet, 8 star facets of equal geometry and dimension positioned around the octagonal table facet so as to enclose the octagonal table facet, and other facets. The girdle has a variable thickness extending circumferentially along the gemstone. The pavilion portion has a height of about 45.5-54% of the length of the gemstone and includes 8 main pavilion facets, 16 pavilion half facets positioned around the main pavilion facets, and other facets.

The invention relates to a decorative element comprising an elongate support body and a multitude of, in particular faceted, gemstones on an adhesive layer on the support body, wherein a minimum position and a maximum position exist for each of the gemstones.

Incident light enters a faceted gemstone and is routed along optical paths to exit the gemstone as emergent light. At least one diffraction grating is patterned on the gemstone in an asymmetrical manner relative to an axis of symmetry. The diffraction grating has a diffractive structure positioned on at least one facet for diffracting the light being routed along at least one of the optical paths to enhance color dispersion of the emergent light. The diffraction grating is the only diffraction grating to diffract the light being routed along the at least one optical path to diminish haze of the emergent light.