AT A GLANCE
Diaphaneity:
Refractive Index:
Luster:
Mohs Hardness:
Semitransparent – Translucent
1.559 – 1.568
Vitreous
6.0 – 6.5
MORE INFORMATION
Color Range:
Gray, Brown, Greenish, Blue, Yellow, Colorless
Major Sources:
Canada, Greenland, Finland, Russia, Italy, Madagascar, Scandinavia, Mexico And United States