inStock

Clear, pure cleavages, Mohs’ hardness of 2.

Good grade, bronze-colored ore, massive.

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

Amphibole group; dark greenish black cleavages, somewhat columnar.

Pure kaolinite powder, 200 mesh.

White, fibrous, silky luster.

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

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

Classic “peacock” aluminum ore.

Classic, white chalk, massive; from Cliffs of Dover, England.