Contrary to a generally held view that pearls are found by chance in oysters, almost all are now produced from farms. This book is a comprehensive treatment of all aspects of the biology of pearl oysters, their anatomy, reproduction, genetics, diseases, etc. It considers how they are farmed from spawning and culturing larvae in hatcheries to adults in the ocean; how various environmental factors, including pollution affect them; and how modern techniques are successfully producing large numbers of cultured pearls. This is the ultimate reference source on pearl oysters and the culture of pearls, written and edited by a number of scientists who are world experts in their fields. - Comprehensive treatment of pearl oyster biology and pearl culture - Written by the top world authorities - Highly illustrated and figured - Of practical relevance to a broad readership, from professional biologists to those involved in the practicalities and practice of pearl production

Pearl: Natural, Cultured and Imitation discusses some aspects, distinction, and authenticity of pearl. This book is divided into 10 chapters that cover the origin, anatomy, sources, and prices of this precious gem. The first five chapters are devoted to natural pearls, their unique features, origin, history, structure, anatomy, and source. The next two chapters cover cultivation and testing of cultured pearls, as well as their market value. A chapter focuses on the properties of various imitation pearls. The concluding chapters deal with the pricing of pearls, primarily based on an elaborate method using a base price referred to as the "unit base price. These chapters also consider other pearl uses other than necklaces, such as borders to brooches and festoons. This book will be of great value to pearl traders, manufacturers, and users.

The rapid growth of gemological sciences and mineralogy demands a dictionary such as this for gemologists, mineralogists, geologists, jewel dealers, industry and hobbyists. With some 16,000 comprehensive definitions, supplemented by more than 250 diagrams and figures, this is a one-stop reference to any matter dealing with gems and gemology.

From their creation in the maw of mollusks to lustrous objects of infatuation and conflict, a revealing look at pearls’ dark history. This book is a beautifully illustrated account of pearls through millennia, from fossils to contemporary jewelry. Pearls are the most human of gems, both miraculous and familiar. Uniquely organic in origin, they are as intimate as our bodies, created through the same process as we grow bones and teeth. They have long been described as an animal’s sacrifice, but until recently their retrieval often entailed the sacrifices of enslaved and indentured divers and laborers. While the shimmer of the pearl has enticed Roman noblewomen, Mughal princes, Hollywood royalty, mavericks, and renegades, encoded in its surface is a history of human endeavor, abuse, and aspiration—pain locked in the layers of a gleaming gem.

Obituary notices of deceased fellows were included in v. 7-64; v. 75 is made up of "obituaries of deceased fellows, chiefly for the period 1898-1904, with a general index to previous obituary notices"; the notices have been continued in subsequent volumes as follows: v. 78a, 79b, 80a-b- 86a-b, 87a 88a-b.