Preferred Buyer From :
All over the world
we offer smoky quartz. chemical composition
silicon dioxide.
color
very wide color range -- colorless, yellow, brown, purple, pink, greenish. crystalline quartz often displays exotic color bands, swirls, and other patterns.
refractive index
r.i. 1.553-1.554. uniaxial positive.
durability
hardness 7.
crystal structure
hexagonal
specific gravity
2.651 for crystalline material, up to 2.91 for crystalline.
sources occurrence
extremely widespread