Tugtupite is a crystal very closely related to Sodalite, and the two can often be found growing together. Tugtupite is tenebrescent, which means that upon exposure to sunlight it will change colour from a pale pink to a much deeper shade. It was first found in Greenland in the late 1950s, and takes its name from the Tugtup area of Greenland where it was discovered..
Vitreous, Waxy, Greasy, Dull
Greenland, Canada, Russia
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