What Is Tourmaline Gemstone | Tourmaline Stone – GIA

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Tourmaline

Tourmalines have a variety of exciting colors with one of the widest color ranges of any gem.

Tourmaline

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SP17-GNI-fig46_215190-636x358.jpg. Rubellite rough

SP17-GNI-fig20_215159-636x358.jpg. Large trillion-cut benitoite — Large trillion-cut benitoite

SP17-Katsurada-Fig5_212257-1280x778.jpg. Compositional diagrams for cuprian liddicoatite samples

SP17-Katsurada-fig4-Comp_212260-1280x431.jpg. Cuprian liddicoatites under daylight-equivalent and long-wave UV light

Fashioned Tourmalines. Jewelry designers create custom mountings to accommodate the shape of fashioned tourmalines. - © GIA & Tino Hammid, courtesy Chris Almquist — Jewelry designers create custom mountings to accommodate the shape of fashioned tourmalines. - © GIA & Tino Hammid, courtesy Chris Almquist

5.19-carat Emerald-cut Tourmaline. This 5.19-carat medium-dark, very strongly greenish blue emerald-cut tourmaline is from Namibia. — This 5.19-carat medium-dark, very strongly greenish blue emerald-cut tourmaline is from Namibia.

Striking Tourmaline. A mine in California’s San Diego County produced this striking tourmaline. - Courtesy Bill and Jeanne Larson — A mine in California’s San Diego County produced this striking tourmaline. - Courtesy Bill and Jeanne Larson

376.85-carat Tourmaline. This 376.85-carat tourmaline was carved by O. Hansen, using the colors of the tourmaline as part of the design. - Chip Clark, courtesy Smithsonian Institution, National Museum of Natural History — This 376.85-carat tourmaline was carved by O. Hansen, using the colors of the tourmaline as part of the design. - Chip Clark, courtesy Smithsonian Institution, National Museum of Natural History

Rubellite Tourmaline Crystal. The colors displayed by the crystal and fashioned gem are typical of tourmaline with the trade name of rubellite. - Courtesy William F. Larson, Pala International — The colors displayed by the crystal and fashioned gem are typical of tourmaline with the trade name of rubellite. - Courtesy William F. Larson, Pala International

Paraíba Tourmaline. Copper is the element that contributes to this Paraíba tourmaline’s highly prized color. — Copper is the element that contributes to this Paraíba tourmaline’s highly prized color.

Fantasy-Cut-SS_164131-1280x720.jpg. Sherris Cottier Shankは自分の作品を、ロールシャッハ・テストと呼ぶ。あなたは9.14カラットのルベライト（紅電気石）トルマリンが何に見えますか？写真提供：Sherris Cottier Shank — Sherris Cottier Shankは自分の作品を、ロールシャッハ・テストと呼ぶ。あなたは9.14カラットのルベライト（紅電気石）トルマリンが何に見えますか？写真提供：Sherris Cottier Shank

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This Month's

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PERIDOT

Found in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem.

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DIAMOND

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EMERALD

Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.

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