Fluorite and Calcite, Durham, England

Contributed by: FMS Admin
Date: Mar 8th, 2026
Locality: Weardale, County Durham, England, UK (See on Mindat)

Description:
From Weardale, Durham, UK, comes this lovely combo. Under midwave UV you get the fluorescence of both the fluorite and the calcite.

Source: Fluorescent Minerals Workgroup MKA : http://fluo.mineralogie.be/

Originally posted by Axel Emmermann on Nature's Rainbows.

Fluorescence under midwave UV light

Normal light.

Summary of luminescence responses:

Calcite (Mindat) (RRUFF)

• Fluorescence under Midwave (305nm LED) UV light: Red

• Fluorescence under Midwave (305nm LED) UV light: Blue