Search results
Results From The WOW.Com Content Network
In the early 1990s, the company released DiaMension®, [9] one of the world's first diamond cut grading software that could accurately measure a rough diamond's measurements within seconds. This transformed the way the industry approached the process of diamond cutting and fueled consumer demand for a wider range of cuts. [ 12 ]
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 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 ...
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 quality of a diamond's cut is widely considered the most important of the four Cs in determining the beauty of a diamond; indeed, it is commonly acknowledged that a well-cut diamond can appear to be of greater carat weight, and have clarity and color appear to be of better grade than they actually are.
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.
Centenary Diamond; Weight: 273.85 carats (54.770 g) Color: Grade D colorless: Cut: Modified heart-shaped brilliant: Country of origin: South Africa: Mine of origin: Premier Mine: Discovered: 17 July 1986: Cut by: Gabi Tolkowsky, Jim Nash and Geoff Woolett: Original owner: De Beers: Owner: Unknown: Estimated value: at least USD 90 million
He owns several retail stores in South Africa, [1] and operates a diamond cutting and polishing business in Johannesburg, South Africa. [1] [2] Shimansky is known for creating what is claimed to be the world's most expensive temporary tattoo [3] and a 900-carat diamond-encrusted soccer ball for the FIFA World Cup. [4] [5] [6]