Spring 1991 G&G Lab Notes
This section, from the Spring 1991 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Purple Jadeite Rock
Detected mineral components—jadeite and quartz, with reddish orange portions of cinnabar—shed light on a purple bead’s possible origin.
Unusual Curved Colour Zoning In Emerald
A report on a 1.17 ct emerald obtained in Kabul, Afghanistan for GIA's permanent reference collection