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!

Sodalite var. Hackmanite - Davis Quarry, Bancroft, Canada

Contributed by: Chris Clemens
Date: Apr 28th, 2026
Locality: Davis Quarry, Dungannon Township, Town of Bancroft, Hastings County, Ontario, Canada (See on Mindat)
Size: 3.4 x 2.5 x 8.3 cm
Weight: 97 g

Description:
This blocky specimen of hackmanite is from the Davis Quarry, Bancroft, Ontario, Canada. Under longwave UV it shows a bright, saturated, orange, fluorescent response. It is also moderately fluorescent under shortwave UV, responding with a dimmer magenta/blue glow. There is also an unidentified cream-colored mineral present as patches on one surface of this specimen, possibly aragonite, that fluoresces blue/white under both wavelengths.

Originally posted by Chris Clemens on Nature's Rainbows in 2017.

Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Normal light.
Normal light.
Normal light. Side 2.
Normal light. Side 2.
Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Fluorescence under shortwave UV light. Side 2
Fluorescence under shortwave UV light. Side 2

Summary of luminescence responses:

Hackmanite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: Orange
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red
  • Tenebrescence after exposure to Shortwave (254nm Lamp/Mercury) UV light: Purple

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