"Classroom Minerals"

Amphibole group; black, coarse, massive.

Light gray, compact, hard, opaque, microcrystalline silica mineral.

Deep blue, massive, with nepheline; key feldspathoid.

Spinel group; iron-black, massive; natural magnet.

Black, Micaceous, glittery metallic.

Classic “peacock” aluminum ore.

Fresh Green forsterite, classic “twin sisters” dunite.

White, fibrous, silky luster.

Pure, white, earthy “China clay”.

Red, earthy, in natural chunk form; common pigment ore.

Brown, fluorescent crystals intergrown in dolomite rock.

Pure, bright yellow, Frasch sulfur.

Bright metallic cubic cleavages; lead ore.

Clear, pure cleavages, Mohs’ hardness of 2.

Good grade, green, massive; copper ore.

Amphibole group; dark greenish black cleavages, somewhat columnar.