Calcite, Fluorite, and Willemite - Castle Dome Mts, Arizona

Contributed by: Mark Cole
Date: Mar 18th, 2026
Locality: Castle Dome Mining District, Castle Dome Mountains, Yuma County, Arizona, USA (See on Mindat)

Description:
Originally posted by Mark Cole on Nature's Rainbows in 2015.

Fluorescence under longwave and shortwave UV light.

Summary of luminescence responses:

Calcite (Mindat) (RRUFF)

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

• Fluorescence under Longwave (365nm LED) UV light: Blue

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