"Freeze-Dried Specimens"

Red, classic oolitic texture.

Pure, white, earthy “China clay”.

Cleaned, pure, bright, metallic native copper.

Light pink, massive, crystalline, translucent.

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