AFG
New tables of Gemstone Identification
Spinel From Kuh-i-lal Pamir Badakhshan Tajikistan
Ruby & Sapphire a gemologist's guide
Botswana's Diamonds - Prospecting to Jewellery
Botswana : Diamond Jewellery
Black Opal, only from Australia
Asterism. Gems with a Star.
Photoatlas of inclusions in gemstones vol.1
Photoatlas of Inclusions in Gemstones vol.2
Photoatlas of inclusions in gemstones vol.3
