Two gem-quality transparent brownish purple specimens, which were initially thought to be spinel due to their colour appearance, turned out to be scapolite. Both the specimens displayed strong pleochroism, with deep saturated and pale purple colors along the “o” and “e” rays, respectively. EDXRF and UV-Vis-NIR spectroscopy showed that the purple colour is likely caused by Fe-impurity.
Choudhary G. (2015) Purple Scapolite. Gems & Gemology, Vol. 51, No. 2, pp 202-203
