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!

Canadian Lightning Storm- Aragonite Bolts from the Long Lake Zinc Mine

Contributed by: Chris Clemens
minID: C83-53H
Date: Apr 23rd, 2026
Locality: Long Lake Zinc Mine (Richardson Zinc Mine; Lynx Mine), Olden Township, Frontenac County, Ontario, Canada (See on Mindat)
Size: 8 x 5.5 x 11 cm
Weight: 610 g

Description:
Aragonite "lightning bolts" fluoresce bright blue/white on this spectacular specimen from the Long Lake Zinc Mine, Olden Township, near Parham, Frontenac Co., Ontario, Canada. Under visible light, this piece looks like an unimpressive chunk of white marble, but under longwave UV a storm of blue, white bolts dominate the display. This specimen is at its best however, when viewed under shortwave UV, showing not only the bright blue/white aragonite lightning bolts, but also a beautiful mix of pink/orange, fluorescent calcite, spots of yellow glowing chondrodite and blue dots of diopside.

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

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

Summary of luminescence responses:

Aragonite (Mindat) (RRUFF)

  • Fluorescence under Longwave (365nm LED) UV light: White
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White
Calcite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red
Chondrodite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Orange
Diopside (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue