Napoleonite, also called corsite because the stone is found in the island of Corsica, is a variety of diorite which is characterized by orbicular structure. The grey matrix of the stone has the normal appearance of a diorite, but contains many rounded lumps 1 or 2 inches in diameter, which show concentric zones of light and dark colors.
网络释义
1、正长石
... Napoleon 拿破仑钻石 napoleonite 正长石 Nassak 纳萨克钻石 ...