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GIA Carlsbad and New York laboratories and campuses will be closed on Monday, May 27 in observance of Memorial Day.
Regular business hours will resume on Tuesday, May 28.

Gem Encyclopedia

Emerald: How Green is Green?
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Gems & Gemology
Spring 2013

Auction Houses: A Powerful
Market Influence
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Featured Article

Kara Ross, Designer to the Stars, Showcases Jewelry at GIA
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featured Research & News

Feature Article

GIA Museum Exhibit: Theatrical Jewelry

JCK visitors can preview pieces from legendary Hollywood designer Tony Duquette and Hutton Wilkinson.
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Field Report

From the Andes to the Pantanál: In Search of Ametrine

We bring you to the source of one of the world’s most unique gems: ametrine. In this gem, nature has combined two quartz varieties, purple amethyst and golden citrine. Ametrine is found only in this exotic Andean nation, a land as unique as the gem it produces.
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Industry Analysis

Price Increases Affect Gemstone Sales

Gem price increases and fewer Chinese buyers affect gem sales at the BaselWorld fair.
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Feature Article

Discover the New Gem Encyclopedia

Explore gem history, buying guides, famous stones, videos and more for 21 popular gemstones.
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Feature Article

See Us at JCK Las Vegas Booth L99

Hear expert talks on gemology trends, see exquisite museum pieces and network with fellow alumni.
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ALUMNI PROFILE

Cufflinks: 227 Years of Family Tradition

Family history runs generations deep at Deakin & Francis. Today, brothers and GIA alumni own the business
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Learn & Connect

This Month's

Featured Gems

Diamond

Diamond

Diamonds are among nature’s most precious and beautiful creations.
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Emerald

Emerald

Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.
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Amethyst

Amethyst

The essence of purple, amethyst is beautiful enough for crown jewels, affordable enough for class rings.
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Sapphire

Sapphire

The name “sapphire” can also apply to any corundum that’s not ruby red, another corundum variety.
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Ruby

Ruby

Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire.
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