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 - Chihuahua, Mexico

Contributed by: FMS Admin
Date: May 8th, 2026
Locality: Chihuahua, Mexico (See on Mindat)
Size: 6 inches

Description:
Another specimen from an old collection, this one an interesting calcite from Chihuahua, Mexico. Anyway, though this one looks like it had a run in with vat of acid, it's still pretty cool. The patterns, shapes and tones are really nice. Though brightest in LW, the other wavelengths offer more subtle beauty. The yellow bands are somewhat phosphorescent, but they are not shown here.

Originally posted by Fire Viper on Nature's Rainbows in 2018.

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

Summary of luminescence responses:

Calcite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: Yellow
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Yellow
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Yellow

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