Tenebrescent scaplite from Afghanistan

Shane F. McClure1, George R. Rossman2, James E. Shigley1

1GIA  Research Laboratory
Carlsbad, CA 92008, USA

2Division of Geological & Planetary Sciences
California Institute of Technology, Pasadena, CA 91125-2500, USA

Abstract

Hackmanite, a sulfur-rich variety of sodalite, was obtained from Badakhshan, Afghanistan. Unlike most hackmanite which changes from light yellow to pink when exposed to sunlight and UV light, respectively, the Afghanistan material turns from colorless to blue upon exposeure to UV radiation.