USA, Brazyl, Austria, Italy, Tanzania, Pakistan, Russia, Sri Lanka, Burma, Color: green, yellow-green, Not Available, Hardness: 5.5 6, Refractive index: 1.66 1.71, Density: 3.25 3.55, Chemical composition: CaMg(Si2O6), Crystal structure: monoclinic, Origins: USA
Spain, Brazil, USA, Sri Lanka, Burma, Color: strongly pleochroic, reddish brown, pink / yellowish green, Hardness: 7 7.5, Refractive index: 1.63 1.65, Density: 3.13 3.21, Chemical composition: Al2SiO5, Crystal structure: orthorhombic, Lustre: vitreous, greasy, Origins: Spain, Burma. Discovered in Andalusia (Spain), the andalusite stone is relatively rare, with big crystals over 10 ct. especially rare. Due to its remarkable pleochroism effect, the stone is highly valued by collectors., brown
Yellow, Colorless, Brown, Blue, Green, gray
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle
Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Transparent, Translucent, Not Available, Transparent . Star Diopside is opaque .
Transparent, Translucent