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The North American craton is the bedrock forming the heart of the North American continent, and the Canadian Shield is the largest exposed part of the craton's bedrock. The Canadian Shield is part of an ancient continent called Arctica, which was formed about 2.5 Ga during the Neoarchean era.
The Crater of Diamonds is part of a 100-million-year-old eroded volcanic formation (a volcanic pipe). The deeply sourced Kimberlite/Lamproite magma brought the diamonds to the surface. The diamonds had crystallized in the relatively stable cratonic root of the continent long before and were sampled by the magma as it rose to the surface.
On 4 October 2006 the 120.6 grams (603 carats) white diamond, the Lesotho Promise was unearthed, which until the January 2018 discovery noted below was the largest reported find this century; at the time it was found it was the 15th largest diamond ever found. The stone is of an exceptional colour, rated D, the top colour for diamonds.
A. ^ Harry Winston Diamond Mines owns 40% and Diavik Diamond Mines, which is 100% owned by the Rio Tinto, owns 60%. B. ^ Dominion Diamond Corporation owns 88.9% while Charles Fipke and Stewart Blusson each own 10%. C. ^ Mountain Province Diamonds owns 44%, De Beers Canada 51% and Camphor Ventures 4.9% D. ^ Pine Point and Port Radium are ghost ...
After the first diamond was found in April 1908 by August Stauch near Grasplatz station, a diamond rush was triggered in German South West Africa. [8] In September 1908, [9] the German government created the Sperrgebiet in its colony in order to make its South West African enterprise profitable, giving sole rights for mining to the Deutsche Diamantengesellschaft ("German Diamond Company").
The paths from cabin to cabin made a perfect diamond in the snow as seen from the slopes above, and so the cabins in the gulch were named Diamond City. The "city" part of the name was a joke, comparing this poor settlement of Southern sympathizers to the booming mining camps of Helena and Virginia City .
This is a partial list of the largest non-synthetic diamonds with a rough stone (uncut) weight of over 200 carats (40 grams). [1] The list is not intended to be complete—e.g., the Cullinan (formerly Premier) mine alone has produced 135 diamonds larger than 200 carats since mining commenced.
Diamond Valley Lake is located within the Domenigoni/Diamond valleys, between the Domenigoni Mountains and Rawson Mountains, 4 miles (6.4 km) southwest of the city of Hemet. The site was chosen because of its location between the cities of San Diego and Los Angeles, and because of the raw materials located on-site for the construction of the ...