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Tourmaline
Complex borosilicate


Tourmaline in the East Region

  • No notable occurrences in database yet.

Tourmaline in the Front Range Region

Tourmaline in the Northwest Region

Tourmaline in the South Central Region

Tourmaline in the Southwest Region

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Tourmaline crystals in quartz matrix from the Four Mile Creek area.

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Tourmaline crystals from south of the Golden Gate Canyon park. It was found in a mica schist near a large quartz outcrop. Specimen is 5 cm wide.

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Tourmaline crystal fragments from the Four Mile Creek area.

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