Qu'est-ce que le granit noir du Shanxi exactement, et d'où ça vient?

Shanxi noir (Shanxi noir) est un granit noir de première qualité extrait principalement dans le comté de Hunyuan, Province du Shanxi, in northern China. Géologiquement, it is actually a diabase (ou diabase-gabbro), an igneous rock composed mainly of plagioclase feldspar and pyroxene with a fine-grained crystalline structure. The quarry area is part of a geological formation stretching roughly 1,000 kilometers from Fengzhen in Inner Mongolia through the Datong mountains down to Fuping in Hebei Province. It is also known by other names such as Imperial Black, Taibai Qing (Taibaiqing), Beiyue Black, ou Night Rose au Japon.