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!

Fluorite - Bluffton Quarry, Ohio

Contributed by: FMS Admin
minID: QFH-P3T
Date: Feb 21st, 2026
Locality: Bluffton Stone Company Quarry, Bluffton, Richland Township, Allen County, Ohio, USA (See on Mindat)
Size: 44 x 30 x 50 mm

Description:
Macro photos of translucent brown fluorite crystals up to 7mm on matrix. Microcrystals of pyrite are also visible in white light. The fluorite fluoresces bright white in LW, with a greenish phosphorescence (also shown, but from a different angle). FOV 30mm.

Originally posted by Dennis Michael on Nature's Rainbows.

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.

Summary of luminescence responses:

Fluorite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: White
  • Afterglow after exposure to Longwave (365nm LED) UV light: Green

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