inStock

Pure, white, earthy “China clay”.

Clear, pure cleavages, Mohs’ hardness of 2.

Feldspar group; pink cleavages showing perthitic texture, common potassium feldspar, Mohs’ hardness of 6.

Amphibole group; black, coarse, massive.

White, fine, massive, opaque to slightly translucent.

White, fibrous, silky luster.

Black, high grade, foliated, greasy feel.

Brown, fluorescent crystals intergrown in dolomite rock.

Amphibole group; dark greenish black cleavages, somewhat columnar.

Brown, earthy, massive; used for yellow pigment.