Gemologists Share the Latest Research ActivitiesAn overview of GIA’s gem identification projects and fancy cut evaluation.
According to legend, Vikings used iolite slices to reduce glare when checking the sun’s position.Learn More
Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.Learn More
The name “sapphire” can also apply to any corundum that’s not ruby red, another corundum variety.Learn More
Sunstone’s phenomenal varieties show a distinct and lively glitter called aventurescence.Learn More
Azure sky, robin’s egg blue: Vivid shades of turquoise define the color that’s named after this gem.Read More