Complimentary Next-Day Service on Diamond Reports
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Brilliance for the Next Generation
New Gemology Enrichment Programs
for Elementary Students
Research & News
Color in Yellow Sapphire
Investigates the various chromophores responsible for color in four types of yellow sapphire.
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.
Solid Laboratory-Grown Single-Crystal Diamond Ring
The quality and size of this 4.04 ct CVD-grown diamond ring demonstrate the advancing technology in laboratory-grown diamonds.
Spray of Columbite Crystals in Topaz
A cluster of bladed columbite crystals is identified in colorless topaz.
Eclogite: Diamond-Encrusted Ancient Seafloor
Explores eclogitic diamonds, which make up a significant portion of the gem diamond market, and what they reveal about Earth’s dynamic processes.
The Special Color Effect in “Chameleon” Amber
An examination of three Burmese chameleon amber specimens using 3D fluorescence spectroscopy.