Brazil, Madagascar, Mozambique, Pakistan, Russia, India, Sri Lanka, China, Color: blue to greenish blue, Hardness: 7.5, Refractive index: 1.57 1.59, Density: 2.67 2.75, Chemical composition: Be3Al2(SiO3)6, Crystal structure: hexagonal, Origins: Brazil, Nigeria, China. Aquamarine is a light blue or light greenish-blue variety of beryl, with darker stones being more expensive. Heat enhancement is often applied to enhance the blue color of aquamarines, but only clean pieces can be heated.
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
Blue
Yellow, Colorless, Brown, Blue, Green, gray
Not Available
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 .