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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


Tourmaline crystal fragments in feldspar and quartz matrix. From the Four Mile Creek area.


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


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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