Estimating the Carat Weight of Mounted Gems. Gems for Days of the Week. Official State Gems of the United States. The Phenomenon of Tenebrescence, seen in HACKMANITE.

Every month we highlight a gemstone and a piece of gemstone identification equipment to help us all understand more about the wonderful world of colored stones and diamonds. The Project begins with a general tutorial as an Introduction to Gemology. You can navigate through the site with the aid of our Contents page.

Pearls Of Wisdom For Novice Gemstone and Jewelry Lovers. Chatham lab created emeralds vs natural. Recently a client contact me about buying an emerald. His only factor was, he wanted to look like a natural emerald rather than a perfectly eye-clean Chatham-created emerald.

Our online app will run on most tablets and computers that can access the internet. Less expensive, faster and more accurate than manual methods. Simple To Use Tools! Colored Stone Weight Estimations. Martin Fuller, GG, MGA, ASA, NAJA Certified Senior Appraiser Fuller and Associates.