名  称：墨玉

岩性成因：岩性为辉绿岩，组成矿物主要为普通辉石、基性斜长石、透辉石，其次为磷灰石和少量磁铁矿，磁铁矿含量一般为3～5%。为基性岩浆大规模侵入集宁岩群冷凝后结晶形成。

形成时代：三叠纪

主要用途：饰面石材及各类工艺品

采集地点：内蒙古丰镇市九龙湾矿区

Name：Black Jade（Commercial Granite Dimension Stone）

Genesis：Diabase，consisting mostly of augite, basic plagioclase, diopside, with subordinate apatite and magnetite. The rock was formed viaextensive intrusion and subsequent consolidation ofthe Jinning basic magma.

Age：Triassic

Usage：Dimension stones and materials for art works.

Sample site：Jiulongwan Mine, Fengzhen, Inner Mongolia.