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.
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(138) results
Blue HPHT Synthetic Diamond Over 10 Carats
Terry Poon and Wuyi Wang, January 27, 2017Results from GIA’s recent testing of a 10.08 ct blue HPHT synthetic diamond, the largest HPHT synthetic recorded to date.
Peer Reviewed Article
Jaipur, India: The Global Gem and Jewelry Power of the Pink City
Andrew Lucas, Nirupa Bhatt, Manoj Singhania, Kashish Sachdeva, Tao Hsu, and Pedro Padua, January 27, 2017Examines 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
Nicholas Sturman, Jeffery Bergman, Julie Poli, Artitaya Homkrajae, Areeya Manustrong, and Nanthaporn Somsa-ard, November 7, 2016Documents the retrieval and testing of P. maxima cultured pearls from a Lombok hatchery.
Seeking the Legacy of Australian Sapphire
Tao Hsu, December 14, 2015Australia has been a prolific supplier of blue sapphire and has made enormous contributions to the global sapphire industry that still shape it today.
How to Photograph Gems & Jewelry
Robert Weldon and Denise Conrad, September 30, 2015Learn tips and tricks for taking great photos of gems and jewelry, even from your mobile device’s high-resolution camera.
Peer Reviewed Article
X-ray Computed Microtomography Applied to Pearls: Methodology, Advantages, and Limitations
Stefanos Karampelas, Jürgen Michel, Mingling Zheng-Cui, Jens-Oliver Schwarz, Frieder Enzmann, Emmanuel Fritsch, Leon Leu, and Michael S. KrzemnickiX-ray computed microtomography reveals the internal features of pearls with great detail.
Peer Reviewed Article
Gray-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia
Carolyn H. van der Bogert, Christopher P. Smith, Thomas Hainschwang, and Shane F. McClureThe Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds colored gray to blue to violet.
Peer Reviewed Article
Gem-Quality Andalusite from Brazil
Shyamala Fernandes and Gagan Choudharyidely known as a rock-forming mineral, andalusite is not frequently encountered as a gem material.
Peer Reviewed Article
Characterization of “Green Amber” With Infrared and Nuclear Magnetic Resonance Spectroscopy
Ahmadjan Abduriyim, et al.A peridot-like bright greenish yellow to green gem material called “green amber” has recently appeared in the gem market.
