CVD Synthetic Diamond Over 5 Carats Identified by GIA
Results from GIA’s recent testing of a 5.19 ct CVD synthetic diamond, the largest it has examined to date.
Blue HPHT Synthetic Diamond Over 10 Carats
Results from GIA’s recent testing of a 10.08 ct blue HPHT synthetic diamond, the largest HPHT synthetic recorded to date.
Solution-Generated Pink Color Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines from Mozambique
Several transparent, faceted, blue to blue-green copper-bearing tourmalines containing growth tubes and cracks surrounded by sleeves of pink color were examined for this report.
Jaipur, India: The Global Gem and Jewelry Power of the Pink City
Examines Jaipur’s role as a colored stone cutting and jewelry manufacturing center, with profiles of 17 companies and their factory, trading, and retail operations.
Bead-Cultured and Non-Bead-Cultured Pearls from Lombok, Indonesia
Documents the retrieval and testing of P. maxima cultured pearls from a Lombok hatchery.
How to Photograph Gems & Jewelry
Learn tips and tricks for taking great photos of gems and jewelry, even from your mobile device’s high-resolution camera.
X-ray Computed Microtomography Applied to Pearls: Methodology, Advantages, and Limitations
X-ray computed microtomography reveals the internal features of pearls with great detail.
Gray-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia
The Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds colored gray to blue to violet.
Gem-Quality Andalusite from Brazil
idely known as a rock-forming mineral, andalusite is not frequently encountered as a gem material.
Characterization of “Green Amber” With Infrared and Nuclear Magnetic Resonance Spectroscopy
A peridot-like bright greenish yellow to green gem material called “green amber” has recently appeared in the gem market.