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A diamond cut is a style or design guide used when shaping a diamond for polishing such as the brilliant cut. Cut refers to shape (pear, oval), and also the symmetry, proportioning and polish of a diamond. The cut of a diamond greatly affects a diamond's brilliance—a poorly-cut diamond is less luminous.
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.
The Millennium Star is a diamond owned by De Beers. At 203.04 carats (40.608 g), it is the world's second-largest known top-color (grade D, i.e., colorless), internally and externally flawless, pear-shaped diamond. The diamond was discovered in the Mbuji-Mayi district of Zaire in 1990 in alluvial deposits; uncut, it was 777 carats (155.4 g). De ...
Diamonds, because of their hardness, are one of the few gemstones that have a recycled market. Recycled diamonds are diamonds that have been polished and set into jewelry, then removed and possibly re-cut before sale back into the diamond industry. This sector accounts for 5%–10% of market supply. [25]
The Internally Flawless grade gave diamond manufacturers a choice to leave blemishes on the surface of the stone, and achieve a grade higher than VVS 1. [2] The second change made to the grading system was the introduction of the I 3 grade. This change was made in response to a growing number of diamonds of very low clarity being cut. [2]
Diamond cutting is the art and science of creating a gem-quality diamond out of mined rough. The cut of a diamond describes the manner in which a diamond has been shaped and polished from its beginning form as a rough stone to its final gem proportions. The cut of a diamond describes the quality of workmanship and the angles to which a diamond ...
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