Gems & Gemology, Summer 2004, Vol. 40, No. 2

Lab-Grown Colored Diamonds from Chatham Created Gems

Peer Reviewed Article
James E. Shigley, Shane F. McClure, Christopher M. Breeding, Andy Hsi-tien Shen, and Samuel M. Muhlmeister
Synthetic colored diamonds (yellow, blue, green, and pink) from a new source in Asia are now being sold by Chatham Created Gems of San Francisco, California. Some of this new material displays hues and weaker saturations that more closely resemble natural diamonds than most of the synthetic diamonds we have encountered previously, which typically had very intense colors. These as-grown and treated type I and type II synthetic diamonds, produced by a high pressure/high temperature process, have many distinctive visual and spectroscopic features that serve to separate them from natural diamonds. These include geometric patterns of color zoning and luminescence, metallic inclusions, and bands seen in the visible and photoluminescence spectra.

Get the latest
Gems & Gemology

The quarterly journal of the Gemological Institute of America.
Download the
Winter 2016 issue

Learn More About Colored Diamonds

Why We Love
Explore colored diamonds history, research, quality factors, and more in the GIA Gem Encyclopedia.
Learn More

You Might Also Like

Find a Retailer
learn more
Shop the Campus Store
Learn More
Quality Assurance Benchmarks
Learn More
Gems & Gemology
G&G Spring 2017 Edition
Learn more