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Tourmaline
Tourmalines have a variety of exciting colors with one of the widest color ranges of any gem.
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Summer 2009 G&G Lab Notes
Importance of the Secondary Market for Fine Gems
Exceptional gems that are recirculated in the gem market make an impact at the Tucson shows.
Wheel of Light’s Mesmerizing Optics
Update on Ametrine from the Yuruty Mine, Bolivia
Mineral Assemblage of “Paraíba Matrix”
Fall 1986 G&G Lab Notes
Liddicoatite Tourmaline from Anjanabonoina, Madagascar
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.
Solution-Generated Pink Color Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines from Mozambique
Spring 2000 Gem News International
“Paraíba”-Type Copper-Bearing Tourmaline from Brazil, Nigeria, and Mozambique: Chemical Fingerprinting By LA-ICP-MS
Gem-quality bright blue to green “Paraíba”-type Cu-bearing tourmaline is now known from deposits in Africa (Nigeria and Mozambique), in addition to three commercial localities in Brazil (in Paraíba and Rio Grande do Norte States).
