David Federman is the author of The Consumer Guide to Colored Gemstones, Gem Profile: The First 60, Gem Profile 2: The Second 60, and a co-author of The Professional’s Guide to Jewelry Insurance Appraising and The Pink Pearl. As a journalist for Modern Jeweler and JCK magazines for more than 30 years, he helped to create the groundbreaking gemstone treatment disclosure system now used by the industry today. His popular column "Gem Profile" for Modern Jeweler magazine won more Neal Awards than any feature in the history of the awards.
©2011-2020 Worthy, Inc. All rights reserved.
Worthy, Inc. operates from 20 W 37 St., 12th Floor, New York, NY 10018