Cuprian Tourmaline

Posted on February 28, 2017 by Çiğdem Lüle, PhD., FGA, GG (GIA)

Discovery of vivid blue, green, and purple-to-violet tourmalines, a.k.a., “Paraíba” in Batalha, Brazil in 1982 changed the way the gem market perceived tourmalines. The unquestionably vivid colors were due to copper and this color agent…

GemWorld articles are accessible by GemGuide members only. To access our archive of articles and get many other great features and benefits, become a member now!

Become a member