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Good grade, brass-yellow copper ore, massive.

Spinel group; black, dull metallic luster; common iron oxide.

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

Pyroxene group; gray-green, coarse crystalline.

White, massive, coarse crystalline vein, Mohs’ hardness of 7.

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.

Feldspar group; white to gray, sodium plagioclase cleavages; some faces may show twinning.