Readers will find fascinating details about the discovery, whereabouts, and value of famous opals, from such classic specimens as the Burning of Troy Opal to th

This book is the latest in the popular Fred Ward Gem Book Series. The full-color photographs give the buyer and enthusiast all the information needed to underst

New edition with added chapters and sections. Provides all the information necessary for complete analysis and evaluation of any opal from a true gem. Properly