"Fantasy Rock" from Greenland - Tugtupite, Sodalite, Chkalovite, Natrolite, Analcime

Contributed by: Mark Cole
Date: Apr 14th, 2026
Locality: Taseq Slope, Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)
Size: 3.5 x 2 x 5 inches
Weight: 23.5 oz

Description:
"Fantasy Rock" is a nickname given to a fantastical assemblage of rare minerals found on the Taseq Slope, Ilimaussaq Complex, Greenland. This specimen consists of cherry red tugtupite, blue/white analcime, pearly white chkalovite, green natrolite, and orange sodalite. The tugtupite has formed around the chkalovite creating "eyes" of striking red and white. Much of the natrolite is a radiating habit, and the sodalite areas are very tenebrescent.

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

Fluorescence under shortwave UV light.

Fluorescence under midwave UV light.

Fluorescence under longwave UV light.

Tenebrescence after exposure to shortwave UV light.

Normal light.

Summary of luminescence responses:

Tugtupite (Mindat) (RRUFF)

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

• Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Blue
• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue

• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green

• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White

• Fluorescence under Longwave (365nm LED) UV light: Orange
• Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Orange
• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Orange