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Quick how-to guide for retailers to test gemstone fluorescence and help identify stones in their own stores.
A diamond’s journey towards the Earth’s surface can result in remarkably familiar shapes.
Discover the science behind some of the most popular phenomenal gemstones.
Small, bead-nucleated freshwater pearls marketed as “akoyas” could cause confusion and mislead consumers.
Easy, step-by-step guide to how GIA analyzes pearls in its laboratory.
Easy, step-by-step guide to how GIA analyzes colored gemstones in its laboratory.
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Gems & Gemology
This Month's
Found in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem.
Dazzling brilliance. Captivating color. These are the planet’s most valued gems.
Diamonds are among nature’s most precious and beautiful creations.
Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.