This vintage book contains an interesting and practical study of the identification of gemstones pearls and ornamental minerals. A comprehensive and profusely-illustrated handbook for both novice and experienced practitioners this volume is not to be missed by anyone with a keen interest in the subject. The chapters of this book include: Crystallography Physical Properties Specific Gravity Light Measurement of Refractive Index Colour in Gem Distinction The Microscope The Gem Species Synthetic Gems Imitation Gems Composite Stones and Artificially Induced Colour etcetera. This book is being republished now in an affordable modern high quality edition - complete with a specially commissioned new introduction on gemmology.