Fluorapatite on Calcite - Bear Lake, Bancroft, Canada

Contributed by: Mark Cole
Date: Apr 4th, 2026
Locality: Bear Lake diggings, Monmouth Township, Highlands East Township, Haliburton County, Ontario, Canada (See on Mindat)

Description:
Shown under SW and MW. Interestingly, very similar material from Otter Lake is not fluorescent.

Originally posted by Mark Cole on Nature's Rainbows in 2016.

Fluorescence under midwave and shortwave UV light.

Normal light.

Summary of luminescence responses:

Calcite (Mindat) (RRUFF)

• Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Red

• Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Blue