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HCA: defining ideal cut diamonds is a detailed explanation of the "Holloway Cut Adviser". A web service that uses this software is available. Malecka, Anna (2017). Naming of the Koh-i-Noor and the Origin of Mughal-Cut Diamonds, The Journal of Gemmology, no. 4. 38(8). OctoNus Software has posted several diamond cut studies, by various authors ...
Oval Cut: Unique and Classic. Oval diamond engagement rings offer a distinctive twist to a classic Round. They're ideal for distinguished, creative people who elegantly stand out from the crowd.
Marcel Tolkowsky found that if a diamond was cut too deep or shallow then light would escape out the sides or bottom of the diamond, resulting in a loss of brilliance (white light reflected up through the top of a diamond), fire (colored light reflected from within a diamond), and sparkle (combination of fire and brilliance). [4]
An example of this is the marquise cut diamond which was popular in the 1970s to 1980s. In later decades, jewelers had little success in selling this shape in comparison to other shapes like the oval or pear shape. [citation needed] The marquise can be cut into an oval diamond by any diamond cutter with a loss of 5 to 10% in total weight.
grade and electronic colorimeter scale [11] grade and electronic colorimeter scale [11] grade [12] grade and description [12] grade for .50ct and over [13] grade for under .50ct: series 1 scale [12] series 2 scale [12] D Colorless: 0 0–0.49 0 0–0.75 Exceptional white + Exceptional white + Colorless: River White Finest White Jager E 0.5 0.5 ...
Diamond certified FL (flawless) by the GIA Two diamonds of grade VS 1 and SI 2 respectively. The GIA diamond grading scale is divided into six categories and eleven grades. [2] The clarity categories and grades are: [3] Flawless category (FL) diamonds have no inclusions or blemishes visible under 10× magnification. [3]
The diamond cut planning stage is a complex process that requires the cutter to work with unique rough stones. Very often, the location of the inclusions in a rough stone will determine the type of shape to which a diamond may be cut. For economic reasons, most diamonds are cut to retain weight instead of maximizing brilliance. [2]
The 2005 AGS cut standards are based on a distance of 25 centimeters (about 10 inches). The 2004 HCA cut standards are based on a distance of 40 centimeters (about 16 inches). Polish and symmetry are two important aspects of cut. The polish grade describes the smoothness of the diamond's facets and the symmetry grade refers to alignment of the ...
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