"Classroom Minerals"

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

Yellow to orange crystal with a glassy luster and smooth, often transparent appearance.

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

Amphibole group; black, coarse, massive.

Cleaned, pure, bright, metallic native copper.

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

Deep blue, massive, with nepheline; key feldspathoid.

Black, Micaceous, glittery metallic.

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

White, fine, massive, opaque to slightly translucent.