"WardsSci000444"

Classic “peacock” aluminum ore.

Gemmy, sherry-colored crystals and sections approximately 3/8– 1/2"

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

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

Small to moderate sized crystals within a mafic matrix and cleavage visible in some specimens.

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.

White, fibrous, silky luster.

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