Yellow and 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

Yellow and Green Tourmaline Properties

Chemical Composition: 
Complex borosilicate
Crystal System / Forms: 
Trigonal
Hardness: 
7.5
Specific Gravity: 
3.06
Lustre: 
Vitreous
Refractive Index / Birefringence: 
1.62-1.64 / 0.018
Sources: 
Brazil, Tanzania, Namibia and Sri Lanka.
Cuts & Uses: 
Brilliant, Mixed.