"gel box"

Amphibole group; black, coarse, massive.

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

Pure, white, earthy “China clay”.

Cleaned, pure, bright, metallic native copper.

White, fibrous, silky luster.

Light gray, compact, hard, opaque, microcrystalline silica mineral.

Pure, large, transparent-to-translucent cleavages, Mohs’ hardness of 4.

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

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

Bright metallic cubic cleavages; lead ore.

Himalayan mineral great for teaching and display.

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

Amphibole group; dark greenish black cleavages, somewhat columnar.

Light pink, massive, crystalline, translucent.

Black, high grade, foliated, greasy feel.

Pyroxene group; dark green, pure cleaved fragments.