Classroom Minerals

Pure, white, earthy “China clay”.

Bright metallic cubic cleavages; lead ore.

Great for geology hardness tests.

Black, high grade, foliated, greasy feel.

Black, Micaceous, glittery metallic.

Deep purple crystal clusters.

Good grade, bronze-colored ore, massive.

Brown, earthy, massive; used for yellow pigment.

Bright blue crystalline veins and coatings in a matrix of mixed copper ore.

Small 1–1.5 mm crystal, octahedrans or cubes, Mohs” hardness of 10.