Scholarship Education 2021 Promotion

GIA Scholarship

Aspire to Shine with a GIA Education

Learn More
DOR Image Collection

Laboratory Service

GIA Diamond Origin: A Program That Makes a Difference

Learn More
Summer 2021 Gems & Gemology Cover

New Gems & Gemology Issue

Blue Fluorescence in Diamonds, “Edison” Treated Pearls, and Pakistan’s Main Gem Market

READ MORE
September 2021 Birthstone Sapphire

September Birthstone

Sapphire: From Royal Blue to a Rainbow of Color

LEARN MORE
featured

Research & News

A counterfeit GIA inscription was found on this CVD laboratory-grown diamond.
Lab Notes

CVD Laboratory-Grown Diamond with Counterfeit GIA Inscription

A CVD laboratory-grown diamond with a fraudulent GIA inscription is submitted to the Antwerp lab.
Read More

Knowledge Session Webinars
Webinar Series

GIA Knowledge Sessions

Engage in webinars on the most diverse and pressing issues in gemology today, including gemstone origin, laboratory-grown stones and new discoveries in field gemology.
Learn More

Diamond paper containing the briolette.
Gem News International

Hole Drilled by Hand in Briolette

A centuries-old diamond featuring a hand-drilled hole inspires an investigation of the briolette cutting style and the history of drilling diamonds.
Read More

A 3.27 ct faceted hexagonite.
Lab Notes

Rare Faceted Hexagonite

The Carlsbad laboratory recently examined an unusually large faceted hexagonite with iridescent cleavage cracks and needle-like structures.
Read More

Bracelet featuring color-enhanced amber.
Gem News International

Unusual Fluorescence of a Color-Enhanced Amber Bracelet

Abnormal fluorescence supports the likelihood that this amber bracelet had been “baked” to enhance its color.
Read More

Brownish red “bent” rutile.
Micro-world

Bent Rutile in Rock Crystal Quartz

Normally straight and fine, rutile needles take an unexpected bend in the polished quartz disk that is their host.
Read More

Learn & Connect

Learn How To Buy

Engagement Rings

Start A Career

in Gems & Jewelry

Use our labs to

Verify a Stone

Download

Gems & Gemology
This Month's

Featured Gems

Featured Gem Peridot
Peridot

Found in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem.
Fancy Color Diamond
Fancy Color Diamond

Dazzling brilliance. Captivating color. These are the planet’s most valued gems.
Diamond
Diamond

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

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

Citrine is the transparent, pale yellow to brownish orange variety of quartz.

View the Gem Encyclopedia