The Rarity of Tanzanite

In 1967, blue-violet crystals of the mineral species, zoisite, were discovered south of Mount Kilimanjaro in northeast Tanzania. The host rocks of the discovery, which are orders of magnitude older than Africa‚Äôs highest mountain, form part of the Lelatema Mountains …

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