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.