'Cobalt-Blue' Gem Spinels
Similarities between natural spinels - with intense blue colour - and synthetic material, have led to difficulties in the recognition of the natural stones by traditional methods.
The Elahera Gem Field in Central Sri Lanka
The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.
A Status Report on Gemstones from Afghanistan
An overview of the plentiful and various gem materials being discovered and produced in Afghanistan.