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Yellow and Green Tourmaline

dark-green-tourmaline
Dark green tourmaline

Yellow and green is the most common of all tourmaline color varieties, but emerald-green is much rarer and more valuable. Indeed, until the 18th century it was often confused with emerald.

Emerald-green stones are found in Brazil, Tanzania, and Namibia; fibrous yellow material occurs in Sri Lanka.

Yellow and Green Tourmaline Pictures

Light green tourmaline

Chemical Composition : Complex borosilicate
Crystal System / Forms :

Trigonal


Cuts & Uses :

Brilliant, Mixed.


Hardness : 7.5
Lustre : Vitreous
Refractive Index / Birefringence :

1.62-1.64 / 0.018


Sources :

Brazil, Tanzania, Namibia and Sri Lanka.


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