"Classroom Mineral Specimens"

White, fibrous, silky luster.

Fresh Green forsterite, classic “twin sisters” dunite.

Deep blue, massive, with nepheline; key feldspathoid.

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

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

Amphibole group; dark greenish black cleavages, somewhat columnar.

Clear, euhedral points and sections.

Good grade, green, massive; copper ore.

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

White, fine, massive, opaque to slightly translucent.