Research Article Search Results
Dyed Yellow Beaded Freshwater Cultured Pearls Imitating South Sea Cultured Pearls
A yellow cultured pearl necklace is compared to the work of a producer specializing in freshwater pearls of all colors.
Sapphires from Northern Ethiopia
A new source of sapphires is found in the Tigray region of Ethiopia.
Partially Hollow Tridacna Blister Pearls with Shells Attached
Blister pearls attached to shells are seen in both the Bangkok and New York laboratories.
Diamond with Unusual Fluorescence Distribution
A submission to the New York lab yields an unexpected reaction to long-wave UV radiation.
A Study of Rubies from Cambodia and Thailand
A report from the GIA Laboratory in Bangkok analyzing 41 Cambodian-Thai rubies.
2017 Las Vegas Trade Spotty, Designers and Diamonds Lead
Designers respond to market trends, demand for diamonds better than expected. Plus: Holiday season diamond marketing campaign gets funding boost.
2017 Vegas Outlook: Decent, But Cautious, Buying
Buyers at the 2017 JCK Show will likely stick to their open-to-buy plans, but take few chances on new lines or extra stock. Plus: An overview of retail sales, auction headlines.
Historical Reading List: The Diamond Fields of South Africa: Part 2 (1893-2014)
Within a few years of their discovery, the diamonds deposits of South Africa produced more diamonds than what had come from India in two millennia.
Historical Reading List: The Ancient Emerald Mines of Egypt
The Lure of American Freshwater Pearls: Revisiting the Latendresse Family
John Latendresse is known as the father of American cultured pearls. He was also a great natural pearl collector and left his family a remarkable natural pearl collection. The Latendresse family is well recognized in the American pearl industry and has long supported GIA pearl research. Come with us to revisit this family and their pearl collection.
