Colemanite - Bigadic Mine, Turkey
Contributed by: FMS Admin
Date: May 27th, 2026
Locality: Bigadiç Mine, Bigadiç District, Balikesir Province, Turkey (See on Mindat)
Size: 4 x 6 inches
Description:
Though not a stunning fluorescent material, colemanite is typically quite bright and sometimes phosphorescent. This specimen, from the Bigadic Mine, Balikesir Province, Turkey, is quite beautiful in natural light. It is a bright bluish white in shortwave and an almost creamy yellow in longwave.
Originally posted by Fire Viper on Nature's Rainbows in 2016.
Summary of luminescence responses:
Colemanite (Mindat) (RRUFF)
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White