Yellow Sodalite var. Hackmanite - Taseq Slope, Greenland

Contributed by: Mark Cole
Date: Apr 3rd, 2026
Locality: Taseq Slope, Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)

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

Fluorescence under longwave UV light.

Fluorescence under shortwave UV light.

Tenebrescence after exposure to shortwave UV light.

Normal light.

Normal light. Specimen size image compared to a US dollar bill.

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