Root Beer Calcite - Clashgorm Mine, Scotland
Contributed by: FMS Admin
Date: Feb 25th, 2026
Locality: Clashgorm Mine, Strontian, Fort William and Ardnamurchan, Highland, Scotland, UK (See on Mindat)
Size: 1.25 x 1 x 2.25 inches
Weight: 2 oz
Description:
From the Clashgorm Mine, Strontian, Argyllshire. Scotland. It was collected in 1998. I was fascinated by the concentric triangles shown best in the MW photo close-up. There are several sets of them. Root beer calcite crystals on white calcite.
Fluorescent pictures were taken at ISO-100, f/11 for 1 second.
90 watts for each UV from about a foot.
Originally posted by John Rofrano on Nature's Rainbows.
Summary of luminescence responses:
Calcite (Mindat) (RRUFF)
- Fluorescence under Longwave (365nm LED) UV light: White
- Fluorescence under Midwave (305nm Lamp/Mercury) UV light: White
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White
- Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red