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!

Brightly Fluorescent and Phosphorescent Celestine, Strontianite and Calcite - Lime City, Ohio

Contributed by: Chris Clemens
Date: Apr 25th, 2026
Locality: Stoneco Lime City Quarry, Lime City, Wood County, Ohio, USA (See on Mindat)
Size: 32 x 26 x 50 mm

Description:
Beautiful fluorescent specimen consisting of clusters of celestine and calcite crystals, from the Stoneco Quarry, Lime City, Wood County, Ohio. This single piece is like two specimens in one! One side is covered with blocky white celestine crystals, partially altered to strontianite. The reverse side is covered with off-white colored scalenohedral calcite crystals. Each side has a completely different look due to the different mineral coverage. The celestine and calcite show a similar fluorescent response: Under shortwave UV the fluorescence is blue/white, and under longwave UV the response is a bit warmer. The calcite and celestine also show bright and lasting phosphorescence under both wavelengths.

Originally posted by Chris Clemens on Nature's Rainbows in 2016.

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 longwave UV light.
Fluorescence under longwave UV light.
Afterglow after exposure to longwave UV light.
Afterglow after exposure to longwave UV light.
Normal light.
Normal light.
Normal light. Side 2.
Normal light. Side 2.
Afterglow after exposure to shortwave UV light. Side 2.
Afterglow after exposure to shortwave UV light. Side 2.
Afterglow after exposure to shortwave UV light. Side 2.
Afterglow after exposure to shortwave UV light. Side 2.
Fluorescence under longwave UV light. Side 2.
Fluorescence under longwave UV light. Side 2.
Afterglow after exposure to longwave UV light. Side 2.
Afterglow after exposure to longwave UV light. Side 2.

Summary of luminescence responses:

Calcite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: White
  • Afterglow after exposure to Longwave (365nm LED) UV light: Green
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White
  • Afterglow after exposure to Shortwave (254nm Lamp/Mercury) UV light: Blue
Celestine (Mindat) (RRUFF)
  • Fluorescence under Longwave (365nm LED) UV light: White
  • Afterglow after exposure to Longwave (365nm LED) UV light: Green
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White
  • Afterglow after exposure to Shortwave (254nm Lamp/Mercury) UV light: Blue

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