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!

Wernerite- A Spectacular Longwave Mineral

Contributed by: Chris Clemens
minID: 2E3-VX0
Date: Apr 25th, 2026
Locality: Ladysmith, Thorne, Pontiac RCM, Outaouais, Québec, Canada (See on Mindat)
Size: 13 x 5 x 13 cm

Description:
Wernerite is a member of the scapolite family, intermediate between meionite and marialite. Its interest to fluorescent mineral collectors is that it is brightly fluorescent under longwave UV, as most fluorescent minerals respond best under shortwave. This specimen is from the Ladysmith Mine, near Otter Lake, Quebec, Canada. Under longwave UV it shows a very bright yellow, fluorescent response. The fluorescence is similar, but dimmer, under shortwave UV.

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

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

Summary of luminescence responses:

Scapolite var. Wernerite (Mindat) (RRUFF)

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

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