USA, Afghanistan, Pakistan, Brazil, Madagascar
Afghanistan, Pakistan, Burma, Brazil, Madagascar, USA, Canada, Russia, Madagascar, Brazil, Canada, Mexico, Madagascar, Brazil, Canada, Mexico
Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)
Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)
Distinct trichroism: yellow green green blue greenHerve Nicolas Lazzarelli
Strong trichroism: colorless pink violetHerve Nicolas Lazzarelli