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There are a limited number of commercially available diamond mines currently operating in the world, with the 50 largest mines accounting for approximately 90% of global supply. [1] Diamonds are also mined alluvially over disperse areas, where diamonds have been eroded out of the ground, deposited, and concentrated by water or weather action.
Discovered in 2015, it is the 5th largest diamond ever discovered at the Crater of Diamonds State Park, Arkansas Identified as a Type IIa crystal, the 8.52 carat diamond was cut and polished by Mike Botha into a custom-designed 4.605 carat Triolette shape during a week long event in North Little Rock and was graded a D IF, 0 Polish & 0 Symmetry ...
Herkimer diamonds are double-terminated quartz crystals discovered within exposed outcrops of dolomite in and around Herkimer County, New York, and the Mohawk River Valley in the US. [ 1 ] [ 2 ] They are not diamonds ; the "diamond" in their name is due to both their clarity and well formed faces.
The "diamond problem" (sometimes referred to as the "Deadly Diamond of Death" [6]) is an ambiguity that arises when two classes B and C inherit from A, and class D inherits from both B and C. If there is a method in A that B and C have overridden , and D does not override it, then which version of the method does D inherit: that of B, or that of C?
The Marange diamond fields are an area of widespread small-scale diamond production in Chiadzwa, Mutare District, Zimbabwe. 'Although estimates of the reserves contained in this area vary wildly, some have suggested that it could be home to one of the world's richest diamond deposits'. [ 1 ]
Diamonds sold through this process are known as conflict diamonds or blood diamonds. [129] In response to public concerns that their diamond purchases were contributing to war and human rights abuses in central and western Africa, the United Nations, the diamond industry and diamond-trading nations introduced the Kimberley Process in 2002. [140]
The diamond is currently set in the Crown of Queen Elizabeth The Queen Mother. There are multiple conflicting legends on the origin of the diamond. [9] However, in the words of the colonial administrator Theo Metcalfe, there is "very meagre and imperfect" evidence of the early history of the Koh-i-Noor before the 1740s. [10]
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.