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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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Tools
Research
Imitation Rubellite Boulders
Paraíba Tourmaline Melee: An Entry-Level Market Perspective
New Tourmaline Pockets in San Diego County’s Pala District
A New Method for Determining Gem Tourmaline Species by LA-ICP-MS
Presents a simplified but comprehensive classification of gem tourmaline species based on quantitative measurement of six common major elements.
Wheel of Light’s Mesmerizing Optics
Importance of the Secondary Market for Fine Gems
Exceptional gems that are recirculated in the gem market make an impact at the Tucson shows.
Mineral Assemblage of “Paraíba Matrix”
Update on Ametrine from the Yuruty Mine, Bolivia
Yellow Mn-rich Tourmaline from the Canary Mining Area, Zambia
High-End Colored Gems
Large and Unusual Gems
Larger Optic Disks
Exceptional innovations using gem and mineral rough at Tucson’s GJX show.
