This 5.19-carat medium-dark, very strongly greenish blue emerald-cut tourmaline is from Namibia.
A mine in California’s San Diego County produced this striking tourmaline. - Courtesy Bill and Jeanne Larson
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
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
Copper is the element that contributes to this Paraíba tourmaline’s highly prized color.
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