Secrets of the Gem Trade: The Connoisseur's Guide to Precious Gemstones

Completely revised and expanded with 11 new chapters: Jade / Demantoid Garnet / Natural Nacreous Pearls / Conch Pearls / Sunstone / Moonstone / Peridot / Cobalt Blue Spinel / Red -Pink Spinel / Golconda (Type IIa) Diamonds. Five new introductory essay: Blue-white diamonds / Jadeite / Natural Pearls / Spinel / Feldspars. Plus 278 color photographs (171 additional) which include exclusive images from major museum collections and the latest auction market icons. The definitive book for anyone wanti…