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The weight retention analysis studies the diamond rough to find the best combination of finished stones as it relates to per carat value. For instance, a 2.20-carat (440 mg) octahedron may produce (i) either two half-carat (100 mg) diamonds whose combined value may be higher than that of (ii) a 0.80-carat (160 mg) diamond plus a 0.30-carat (60 ...
The Cullinan Diamond is the largest gem-quality rough diamond ever found, [2] weighing 3,106 carats (621.20 g), discovered at the Premier No.2 mine in Cullinan, South Africa, on 26 January 1905. It was named after Thomas Cullinan, the owner of the mine. In April 1905, it was put on sale in London, but despite considerable interest, it was still ...
The necklace contained over 250 carats (50 g; 1.8 oz) of diamonds, among them a 16 carats (3.2 g; 0.11 oz) D-color Flawless clarity marquise cut. The Graff Pink of 24.78 carats, graded Fancy Intense Pink colour and with a November 2010 Sotheby's auction pre-sale estimate price of US$27 million to US$38 million (£17 million to £24 million).
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.
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]
This was the first bra to be featured on the Victoria’s Secret Fashion Show runway and featured 1,200 Sri-Lankan pink sapphires, more than 2,300 round and marquis diamonds and a 90-carat emerald ...
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