Tugtupite with Sodalite

specimen number:
2072245

location:
Kvanefjeld, Ilimaussaq, Kujalleq, Greenland

description:
Pinkish masses of tugtupite throughout matrix. Brightly fluorescent. Classic for the species and locality.

The Ilimaussaq complex, situated near Narsaq in South Greenland, is the type locality for tugtupite, a rare beryllium aluminum tectosilicate. Geologically, this site is part of the Gardar Province, an ancient rift system where alkaline igneous activity produced highly evolved rocks such as lujavrites and naujaites that are exceptionally rich in rare elements. Tugtupite occurs primarily in hydrothermal veins and analcime-rich patches within these alkaline rocks, prized for its ability to change color from pale pink or white to a deep crimson red when exposed to ultraviolet light (tenebrescence). Historically, the mineral was first discovered in 1957 and formally described in 1962, with small-scale specimen mining and quarrying activities occurring intermittently to support the lapidary and collector markets. Unlike large-scale industrial operations, the extraction of tugtupite has been largely localized, with significant interest peaking in the late 20th century as its unique fluorescent and photochromic properties became world-famous. Today, the Kvanefjeld area remains the most notable site for this mineral, representing a significant chapter in Greenland's rich geological and mining history.

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