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A white and purple pearl sitting in half of its shell.
Article
Clam Chowder with a Side of Pearl

Recently, GIA’s laboratory in New York had the opportunity to examine a fascinating pearl find and hear about an even more fascinating story.

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Pearl
Article
Pearl Description

Perhaps the best-loved gems of all time, pearls—both natural and cultured pearls—occur in a wide variety of colours. Learn about the factors that make pearls so popular and desirable!

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Eight natural-color pistachio pearls
Identification of “Pistachio” Coloured Pearls Treated by Ballerina Pearl Co.

A report on the colour treatment process for these intensely greenish yellow to yellowish-green cultured pearls and the techniques for identifying them.

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Pearl farm on the Indonesian island of Lombok
Bead-Cultured and Non-Bead-Cultured Pearls from Lombok, Indonesia

Documents the retrieval and testing of P. maxima cultured pearls from a Lombok hatchery.

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Three pieces of labradorite with yellow, blue and green flashes of color.
Article
Optical Effects of Phenomenal Cabochons

Learn how the structure, inclusions and properties of some gemstones interact with light to create unusual visual effects.

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Article
Pearl Journey

Perfect shining spheres. Lustrous baroque forms. Seductive strands, warm to the touch. Pearls are simply and purely organic

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Pearl
Article
Pearl History and Lore

People have coveted natural pearls as symbols of wealth and status for thousands of years.

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Pearls
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Pearl Quality Factors

Learn about the factors that make pearls so desirable.

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Man stands in front a GIA banner that features gemstones.
Article
The ABCs of Pearls Reveal Fascinating Aspects of Gems from the Deep

“The A-Z of Pearls”, with at least one pearl-related subject for each letter of the alphabet, was presented in Thailand recently.

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A large group of people outside on GIA’s Carlsbad, California  campus.
Article
Guardians of Trust: GIA’s Innovative Research, Instruments and Services

GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.

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