gemologicalinstituteofamerica

GIA (Gemological Institute of America)

gemologicalinstituteofamerica

GIA (Gemological Institute of America)

gemologicalinstituteofamerica

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At GIA, we’ve spent nearly 100 years ensuring that diamonds, colored stones, and pearls are assessed and graded on their quality with unbiased scientific precision. Our… more

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Diamond Buying Tips

Gems Graded by GIA

Citrine Birthstone: Gems and Jewelry

Garnet Birthstone: Gems and Jewelry

Amethyst Birthstone: Gemstones and Jewelry

Colored Diamonds

Zircon Birthstone: Gemstone and Jewelry

Turquoise: December's Birthstone

Tanzanite Birthstone: Gemstone and Jewelry

Birthstones

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