Related Clues:

• Mineral covered in chemical
• Coming from Michigan half case of mineral
• Mineral used in auto paint
• Utterance of prophet? It's usually transparent
• It's noted for its cleavage
• Mineral whose name is Latin for "crumb"
• Material in holy book not hard ultimately
• It makes granite glint
• Mineral known for perfect cleavage
• It makes flakes
• Mineral in layers
• Mineral that could be discharged by seismic activity
• Glittery piece in Pueblo pottery
• Mineral that can be cleaved
• Flakes in geology class