Identification Sphalerite Identification Sheet The principal zinc ore and a notorious deceiver: brilliant adamantine to resinous luster, six-direction cleavage, and a pale streak that …
Identification Beryl (Aquamarine and Emerald) Identification Sheet The beryllium silicate behind emerald, aquamarine, and morganite: long hexagonal prisms, harder than quartz, in pegmatites.
Identification Garnet Group Identification Sheet Not one mineral but a family — hard, dense, and found in almost every metamorphic rock Rockies encounter.
