This is a full-colour guide to identifying and evaluating alexandrite, andalusite, chrysoberyl, cat's-eye, kyanite, sillimanite, common opal, fire opal, dinosau

This guide provides concise, interesting and practical details on uncommon gems that are now being used by designers to create distinctive jewelry. It also list

A full-colour guide for lay people and professionals about gold, platinum, palladium, silver, copper, bronze, brass, iron, titanium, niobium, aluminium, stainle

To help you to be a smart buyer, this book discusses in detail how colour, shape, cut, clarity, transparency, treatments and geographic origin affect the value

This 3rd Edition provides concise yet comprehensive information on colored gem quality evaluation, price comparison, gem identification, cutting styles, treatme