A relaxing range of greens from olive to yellowish. The surfaces of unworked crystals are often covered in tiny grey scales of mica.
Formula: Al2SiO4
Hardness: 7.5
Density: 3.05 – 3.20 g/cm3
Refractive Index: 1.629 – 1.660 DR: 0.0014 – 0.032
Color:
Green, yellowish-green, brown, pink, colorless
Countries of Origin: Brazil, Sri Lanka