"WardsSci000444"

Kaolin is a white clay mineral that has vast industrial uses

Pyroxene group; gray-green, coarse crystalline.

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

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

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

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.

White, fibrous, silky luster.