Tugtupite, Sodalite, and Other Favorites - Taseq Slope, Greenland

Contributed by: Chris Clemens
minID: P0H-A28
Date: May 2nd, 2026
Locality: Taseq Slope, Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)
Size: 7 x 6 x 13 cm
Weight: 612 g

Description:
Brick-shaped rock consisting of white to light pink tugtupite, light colored sodalite (var. hackmanite), grey analcime, chkalovite and dark grains of non-fluorescent arfvedsonite. This specimen shows a complex, multi-colored fluorescent response under all UV wavelengths. Collected in 2005 by Howie Green, on the Taseq Western Slope, Narsaq, Kujalleq, Greenland.

The tugtupite fluoresces cherry red, the hackmanite orange, uranyl-activated analcime green, and an unknown mineral shows a blue response under shortwave UV (254nm).

Originally posted by Chris Clemens on Nature's Rainbows in 2018.

Fluorescence under shortwave UV light.

Afterglow after exposure to 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:

Hackmanite (Mindat) (RRUFF)

• Fluorescence under Longwave (365nm LED) UV light: Orange
• Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Orange
• Tenebrescence after exposure to Shortwave (254nm Lamp/Mercury) UV light: Purple

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