Opals is one of eight gem books in a series written by Fred Ward and Charlotte Ward and photographed by Fred Ward and their son Christopher Ward. Charlotte Ward updated this edition. Each title, Rubies & Sapphires, Emeralds, Diamonds, Diamonds (in Russian), Pearls, Gem Care, Jade, and Phenomenal Gems, provides part of a continuing global exploration into the history, geology, lore, and sources of priceless jewels. Glamor, intrigue, romance, and the quest for treasure make these books valuable and fundamental to any gem library. They appeal to miners, jewelers, museums, and consumers alike. The Wards believe that the more people know, the better and safer they will buy. As long as humankind has roamed the world, they have placed extraordinary value on the incredible gifts from the land and sea. To support a love of gemstones with valid information, the Wards provide gorgeous illustrations and concise text gathered from experts around the world. The books read like tales of adventure, rich in detail on assessing the vital aspects of the finest of the fine and the rarest of the rare.