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Pearl
Perfect shining spheres. Lustrous baroque forms. Seductive strands, warm to the touch. Pearls are simply and purely organic.
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Summer 1986 G&G Lab Notes
This section, from the Summer 1986 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.
The Pearl in the Chicken: Pearl Recipes in Papyrus Holmiensis
Several pearl-in-chicken cleaning experiments are carried out to test the validity of recipes from an ancient Egyptian source.
Pearl Fashion Through the Ages
A history of pearls in jewelry and fashions through the ages.
Freshwater Pearls of North America
The American freshwater pearl industry and its new entry, the freshwater cultured pearl.
Gemological Characteristics of Saltwater Cultured Pearls Produced After Xenotransplantation
Spectroscopic and radiographic study of experimental saltwater cultured pearls produced from xenotransplantation between P. margaritifera and P. maxima.
Two Pearls of Indian Cultural Significance
Two pearls representing Indian deities were recently examined in the Mumbai laboratory.
Sweet Home Mine Rhodochrosite from 1888
A rhodochrosite on display at AGTA dates back more than a century to Colorado’s Alma Mining District.
A Large Multicolored Natural Blister Pearl
A large baroque-shaped blister pearl with a unique multicolored appearance is examined in the Mumbai laboratory.
Fashioned Queen Conch Shell Bead
A Queen conch shell bead is submitted for pearl identification to the Mumbai laboratory.
Iridescent Pen Shell
Aragonite and calcite create a captivating iridescent effect in a Pinnidae shell.
From Single Source to Global Free Market: The Transformation of the Cultured Pearl Industry
Over the past 15 years a combination of market forces, environmental events, and scientific research has radically changed the cultured pearl industry.
Winter 2011 G&G Lab Notes
This section, from the Winter 2011 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.
