"WardsSci000444"

Yellow to orange crystal with a glassy luster and smooth, often transparent appearance.

Feldspar group; calcium end member plagioclase crystals in pyroxene matrix.

Feldspar group; greenish gray alkali feldspar, coarse crystalline, some iridescence.

Cut black mica cleavage sheets.

Deep blue, massive, with nepheline; key feldspathoid.

Crystals and crystal sections up to 1", Mohs’ hardness of 9.

White, fibrous, silky luster.

Fresh Green forsterite, classic “twin sisters” dunite.

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

White, fine, massive, opaque to slightly translucent.

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

Amphibole group; dark greenish black cleavages, somewhat columnar.

Good grade, green, massive; copper ore.

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

Pure, white, earthy “China clay”.

Cleaned, pure, bright, metallic native copper.