Bronzite

Bronzite, one of the rhombic pyroxenes, differs from augite (q.v.) in crystallising in the prismatic or rhombic system. It takes its name from its bronze-like lustre, intermediate between pearly and metallic. It has a foliated structure and occurs in serpentinite. Bronzite is extremely infusible, being only rounded at the edges of thin splinters by the blowpipe flame, and it is, therefore, taken as 6, the highest standard in Von Kobel's scale of fusibility.