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 Carbonado, Washington Carbonado is a town in Pierce County, Washington, United States. Carbonado is located near the Carbon River in northern Pierce County, approximately 50 miles (80 km) southeast of Seattle. Carbonado is the last town before entering Mount Rainier National Park and is also a popular spot for jeeping. Carbonado served as an important coal mining community in the late nineteenth and early twentieth centuries, when the town operated the largest coal mine in Pierce County. The population was 610 at the 2010 census. Carbonado was one of quite a few towns in the Carbon River valley to be