"Classroom Mineral Specimens"

Crystals and crystal sections up to 1", Mohs’ hardness of 9.

Fresh Green forsterite, classic “twin sisters” dunite.

White, fibrous, silky luster.

White, fine, massive, opaque to slightly translucent.

Good grade, green, massive; copper ore.

Clear, euhedral points and sections.

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

Feldspar group; good cleavages of pure soda lime feldspar; most show twinning and labradorescence.

Amphibole group; dark greenish black cleavages, somewhat columnar.

Pure, white, earthy “China clay”.