Gemmology is the science of natural and artificial gems and gemstones, considered to be a geoscience and a branch of mineralogy. Although a profession in its own right, gemmology is often studied by jewellers to augment their abilities of gem identification. This comprehensive guide concentrates on the history of Jade in China, and includes the chapters: The Chou Dynasty; The Classic Age of Jade Carving--from Han to Sung; From Sung to Ming; From Ming Onwards; The Material Aspect of Jade; Jade Objects of the Chou Dynasty Tabulated from Laufer; Note on the Lo-Yang Tombs; and Common Symbols. This rare text constitutes a definitive guide on the subject and will greatly appeal to gemmologists and collectors of rare gemmological texts. This book has been elected for republication due to its immense educational value and is proudly republished here with a new introduction on the topic.