Fluorescent Mineral Database

A new secret project! Trying to create a nice Fluorescent Mineral Database (FMDB), which would be searchable by mineral, locality, and luminescence properties. Also making it easy for people to contribute with their own specimens!

Witherite, Calcite, Barytocalcite - Rampgill Mine, Cumbria, England

Contributed by: Mark Cole
Date: Mar 26th, 2026
Locality: Rampgill Mine, Nenthead, Alston Moor, Eden, Cumbria, England, UK (See on Mindat)

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

Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Afterglow after exposure to shortwave UV light.
Afterglow after exposure to shortwave UV light.
Fluorescence under midwave UV light.
Fluorescence under midwave UV light.
Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Normal light.
Normal light.

Summary of luminescence responses:

Barytocalcite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: Pink
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Pink
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Pink
Calcite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Yellow
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Yellow
Witherite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: White
  • Fluorescence under Longwave (365nm LED) UV light: White
  • Afterglow after exposure to Shortwave (254nm Lamp/Mercury) UV light: White

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