"WardsSci000444"

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

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

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

Cut black mica cleavage sheets.

Classic “peacock” aluminum ore.

White, fibrous, silky luster.

Deep blue, massive, with nepheline; key feldspathoid.

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

Red, classic oolitic texture.

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