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Tourmaline
Tourmalines have a wide variety of exciting colors with one of the widest color ranges of any gem.
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In Memoriam: Heitor Barbosa
The life of the discoverer of Paraíba tourmaline is remembered.
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Interesting Metallic Platelets in a Brazilian Paraíba Tourmaline
Microscopic observation unveils the first known instance of skeletal metallic inclusions in Brazilian Paraíba tourmaline.
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New Tourmaline Pockets in San Diego County’s Pala District
Bill and Carl Larson share details about new tourmaline pocket discoveries at the Tourmaline King mine.
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Cat’s-Eye Paraíba Tourmaline with Copper Inclusions
The Tokyo laboratory examines a Paraíba tourmaline with chatoyancy caused by copper inclusions.
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Exceptional Natural-Color Fancy Red Diamond
An extremely rare natural-color red diamond is submitted to the Carlsbad laboratory.
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Small “Surprise” in Elbaite Tourmaline
Diopside crystals observed in elbaite tourmaline resemble an exclamation point.
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Stellate Zircon in a Paraíba Tourmaline
Fiber-optic light reveals a remarkable set of stellate inclusions in blue-green Paraíba tourmaline.
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“Smoke Rings” in a Non-Beryllium-Diffused Sapphire
A rare look at a smoke ring pattern identified in sapphire without the presence of beryllium.
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Book Review: Pegmatites and Their Gem Minerals
Review of Pegmatites and Their Gem Minerals by Michael Menzies and Jeffrey Scovil.
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The Big Find: Celebrating 50 Years of Maine Tourmaline
The historic discovery of a Maine tourmaline source is celebrated through jewelry designs featuring gems unearthed 50 years ago.
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