Carbonado Carbonado Carbonado, commonly known as the "black diamond", is the toughest form of natural diamond. It is an impure form of polycrystalline diamond consisting of diamond, graphite, and amorphous carbon. It is found primarily in alluvial deposits in the Central African Republic and in Brazil. Its natural colour is black or dark grey, and it is more porous than other diamonds. Carbonado diamonds are typically pea-sized or larger porous aggregates of many tiny black crystals. The most characteristic carbonados have been found only in the Central African Republic and in Brazil, in neither place associated with kimberlite, the source of
Carbonado, Washington its possession. The time that Carbonado did spend as a coal mining town is forever kept by the cemetery, abandoned mines, a grown-over coal slag pile, a school, and the company houses left behind. The cemetery holds the memories of older and more recent dead with many of the graveholders family still living nearby. Huge concrete monoliths that once held that cables for the mining carts, point straight towards the old mine shafts and openings and stand overgrown and utilized now only by the town's children. One hill in town started out as the coal slag pile and now has