A faceted pezzottaite from Afghanistan.

The article discusses the gemological properties of a 1.11 carat faceted pezzottaite from Afghanistan that was donated to the Gemological Institute of America (GIA) . The sample had a birefringence of 0.007 and a specific gravity of 2.97. Its diapheneity resulted to transparent to semitransparent, while its fluorescence exhibited a very weak violet to long-wave ultraviolet (UV), and a weak banded white to short-wave. Chemical analyses of this 1.11 ct stone by electron microprobe confirmed its identity as pezzottaite.