Sodalite var. hackmanite

Badakhshan Province, Afghanistan

Sodalite var. hackmanite
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Article codeVIII.J.1110.004
This specimen fluoresces partly orange under UV light. It shows no tenebrescence. Measures approximately 75x45x30 mm and weighs approximately 0,100 kilogramme.

The variety Hackmanite is a sulfur-rich form of Sodalite, and is prized for its lovely pink color and strong fluorescence under long or under short-wave UV-light.
Hackmanite has a unique optical property called tenebrescence, in which its color will be more saturated after exposure to ultraviolet light and then eventually fade.