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!

Calcite Crystals from Chihuahua, Mexico

Contributed by: Mark Cole
Date: Apr 11th, 2026
Locality: Chihuahua, Mexico (See on Mindat)

Description:
Had a buddy stop over today (John S.) with a beautiful cluster of calcite crystals - dogtooth crystals fluoresce a very pretty off-white, while the matrix calcite a bright orange. Shown under MW and SW.

Originally posted by Mark Cole on Nature's Rainbows in 2017.

Fluorescence under midwave and shortwave UV light.
Fluorescence under midwave and shortwave UV light.
Normal light.
Normal light.

Summary of luminescence responses:

Calcite (Mindat) (RRUFF)

  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: White

FMDB Home Page
Submit a new specimen!
My Collection