Gemstones of the World: Newly Revised Fifth Edition
Gem: The Definitive Visual Guide
The Pearl Book: The Definitive Buying Guide
The Jeweler's Directory of Gemstones: A Complete Guide to Appraising and Using Precious Stones From Cut and Color to Shape and Settings
Diamond Handbook: A Practical Guide to Diamond Evaluation (Newman Gem & Jewelry Series)
Gem Identification Made Easy, 6th Edition: A Hands-On Guide to More Confident Buying & Selling
Exotic Gems: (Volume 4) How to Identify, Evaluate & Select Jade & Abalone Pearls (Newman Exotic Gems)
Jewelry & Gems―The Buying Guide, 8th Edition: How to Buy Diamonds, Pearls, Colored Gemstones, Gold & Jewelry with Confidence and Knowledge (Jewelry and Gems the Buying Guide)
Smithsonian Handbooks: Gemstones
Secrets of the Gem Trade: The Connoisseur's Guide to Precious Gemstones