Black, high grade, foliated, greasy feel.
White, fine, massive, opaque to slightly translucent.
White, fibrous, silky luster.
Clear, pure cleavages, Mohs’ hardness of 2.
Red, classic oolitic texture.
Black, Micaceous, glittery metallic.
Pure, white, earthy “China clay”.
Brown, earthy, massive; used for yellow pigment.
Spinel group; black, dull metallic luster; common iron oxide.
Good grade, green, massive; copper ore.
Fresh Green forsterite, classic “twin sisters” dunite.
Shiny crystal clusters and crystalline groups, this 'fools gold' is brassy and leaves a black streak.
Pyroxene group; gray-green, coarse crystalline.
Good grade, bronze-colored ore, massive.
Light gray, compact, hard, opaque, microcrystalline silica mineral.
Clear, euhedral points and sections.
