Fluorescent Mineral Database

Fantasy Rock from Taseq Slope, Greenland

Contributed by: Simone Conti
minID: CDH-VK5
Date: Jun 8th, 2026
Locality: Taseq Slope, Ilímaussaq complex, Kujalleq, Greenland (See on Mindat)
Size: 6 x 8 x 10 cm
Weight: 517 g

Description:
Nice and colorful “fantasy rock” from the Taseq slope in Greenland. We have chkalovite “eyes” surrounded by tugtupite (tugtupite replacing the chkalovite), analcime, and a radial nodule of natrolite, white in daylight. Under UV light the chkalovite fluoresces white/grey under both short and midwave UV, the tugtupite red under shortwave and orange mid/long wave, and the analcime light blue. The midwave photo seems to cleanly differentiate the chkalovite from the analcime. The natrolite fluoresces green under both short and mid wave UV.

Fluorescence under shortwave UV light.
Fluorescence under shortwave UV light.
Fluorescence under midwave UV light.
Fluorescence under midwave UV light.
Fluorescence under longwave UV light.
Fluorescence under longwave UV light.
Normal light.
Normal light.

Summary of luminescence responses:

Analcime (Mindat) (RRUFF)

  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Blue
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Blue
Chkalovite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: White
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: White
Natrolite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Green
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Green
Tugtupite (Mindat) (RRUFF)
  • Fluorescence under Shortwave (254nm Lamp/Mercury) UV light: Red
  • Fluorescence under Midwave (305nm Lamp/Mercury) UV light: Orange
  • Fluorescence under Longwave (365nm LED) UV light: Orange