"WardsSci000478"

Kaolin is a white clay mineral that has vast industrial uses

Bright metallic cubic cleavages; lead ore.

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

Vente

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

Vente

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

Clear rhombs showing double refraction.