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Carbonado, commonly known as black diamond, is one of the toughest forms of natural diamond. It is an impure, high-density, micro-porous form of polycrystalline diamond consisting of diamond, graphite , and amorphous carbon , with minor crystalline precipitates filling pores and occasional reduced metal inclusions. [ 1 ]
In 2006, Black Diamond Equipment Asia was established in Zhuhai, China to serve as both a secondary manufacturing facility, as well as a global distribution hub. In May 2010, Black Diamond Equipment was acquired for $90 million by Clarus Corporation. The resulting corporation was renamed and is now publicly traded on the NASDAQ under the name CLAR.
The Diamond Calk Horseshoe Company of Duluth, Minnesota, USA was founded in 1908 by blacksmith Otto Swanstrom.. Initially manufacturing horseshoes with a special type of calk to improve the animals' foothold on slippery surfaces, the company successfully adapted to the development of motorised transport for the masses and produced a range of adjustable wrenches and pliers from the 1920s.
Jakob Ingebrigtsen broke the 28-year-old 3,000-meter world record at the Silesia Diamond League, while Mondo Duplantis broke his pole vault record yet again.
It is responsible for a community building experience named "Little Cities of Black Diamonds." It includes organizing local history bus tours, the Little Cities of the Forest, the Little Cities Archives, the Little Cities of Black Diamonds Day, and the Appalachian Spring Festival.
The rich coal deposits and sandstone hills of Black Diamond Mines Regional Preserve were formed by geological activity in the Tertiary period. [7] In the period between the Paleocene epoch and Miocene epoch of the Tertiary era, the North American Plate and the Pacific plate came together at a subduction zone where the North American Plate was pushed over the Pacific Plate.