Phlogopite in calcite

Contributed by: FMS Admin
Date: Nov 14th, 2025
Locality: Kokcha Valley, Badakhshan, Afghanistan (See on Mindat)

Description:
Phlogopite in calcite, Koksha valley, Badakhshan, Afghanistan (specimen courtesy of Wouter Van Tichelen). UV-C @275 nm

Originally posted by groensteenfreterke on Nature’s Rainbow.

Fluorescence under shortwave UV light.

Normal light.

Summary of luminescence responses:

Phlogopite (Mindat) (RRUFF)

• Fluorescence under 275nm LED UV light: Yellow