Initially published in 1992, the Pearl Buying Guide was the first book to give consumers details on judging pearl quality and value. The 186 new colour photos in this updated 6th edition show new types of pearls, clasps and jewellery styles. Information has been provided on natural pearls, treatments, cultivation and identification techniques. All types of pearls are discussed–Akoya, Tahitian, South Sea, Sea of Cortez, freshwater, abalone, scallop, conch, melo, quahog, giant clam, mabe, blister, keshi, natural, imitation, cultured. Although technical data is included to aid gemmologists in detecting treatments and identifying pearls, the easy reading style and the 364 photos make this a customer-friendly book for both consumers and professionals.