Benitoite - Dallas Gem Mine, California, USA

Contributed by: Mark Cole
Date: Mar 12th, 2026
Locality: California State Gem Mine, Santa Rita Peak, San Benito County, California, USA (See on Mindat)

Description:
Single locality mineral, valued as a gemstone. Very bright under shortwave...

Originally posted by Mark Cole on Nature's Rainbows.

Fluorescence under shortwave UV light.

Normal light.

Normal light. Closeup image

Normal light. Closeup image

Summary of luminescence responses:

Benitoite (Mindat) (RRUFF)

• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue