Classroom Minerals

Brownish gray, translucent.

Pyroxene group; gray-green, coarse crystalline.

Amazonite

A classroom set that covers the major types of coal.

White, massive, coarse crystalline vein, Mohs’ hardness of 7.

Clear to yellow translucent.

Spinel group; black, dull metallic luster; common iron oxide.

Good grade, brass-yellow copper ore, massive.

Pure kaolinite powder, 200 mesh.

Exemplary display of hexoctahedral crystal shape.