Colombia, Color: Red, Orangey Red, Orange, Yellow, color shift to Green, Hardness: 6 6.5, Refractive index: 1.55 1.56, Density: 2.66 2.70, Chemical composition: (Na, Ca)(Si, Al)4O8, Crystal structure: triclinic, Origins: Congo, Tibet.
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
Red, Yellow, White, gray, Green, Colorless
Yellow, Colorless, Brown, Blue, Green, gray
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle
Transparent, Translucent, Transparent to translucent
Transparent, Translucent, Not Available, Transparent . Star Diopside is opaque .