◂ BACK TO GEM ENCYCLOPEDIA
Tourmaline
Tourmalines have a variety of exciting colors with one of the widest color ranges of any gem.
See Gem As
Tools
Research
Tourmaline as an Inclusion in Zambian Emeralds
A report on Zambian emeralds with tourmaline inclusions.
Sri Lanka: The Gem Island
An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
GIA's Gübelin Gem Project: Tourmaline
Tourmalines have a very complex chemical composition, and more than a dozen mineral species are recognized within this group.
Multicolored Bismuth-bearing Tourmaline from Lundazi, Zambia
Tourmalines from an alluvial deposit near Lundazi in Zambia consist of color zoned pink/colorless/yellow-green “watermelon” nodules.
Copper-Bearing Tourmalines from New Deposits in Paraíba State, Brazil
Two new deposits of Cu-bearing tourmaline have been found in Paraíba State, Brazil, not far from the original source at Mina da Batalha.
Small “Surprise” in Elbaite Tourmaline
Diopside crystals observed in elbaite tourmaline resemble an exclamation point.
“Smoke Rings” in a Non-Beryllium-Diffused Sapphire
A rare look at a smoke ring pattern identified in sapphire without the presence of beryllium.
Stellate Zircon in a Paraíba Tourmaline
Fiber-optic light reveals a remarkable set of stellate inclusions in blue-green Paraíba tourmaline.
Tourmaline Termination
Books: Exotic Gems, Volume 3
Review of Exotic Gems, Vol. 3: How to Identify, Evaluate, Select and Care for Matrix Opal, Fire Agate, Blue Chalcedony, Rubellite Indicolite, Paraíba and Other Tourmalines, by Renee Newman.
Tourmaline Care and Cleaning Guide
Learn about tourmaline's durability and how to care for your tourmaline jewelry.
