Book - Opal Identification & Value by Paul B. Downing, Ph.D.

Opal Identification & Value by Paul B. Downing PhD - Revised, Expanded & Updated

A self-proclaimed "opalholic", Paul B Downing PhD has an international reputation as an opal expert having travelled extensively in Australia and throughout the United States cultivating his knowledge.

This hard cover book is beautifully presented with hundreds photographs and illustrations.