Recently I had the privilege to attend Converge—a unique event uniting GIA’s research and education with our sister organization the American Gem Society’s professional development opportunities—and ...

Gem hunting, or rock hounding, is a fascinating hobby that allows people to find rare rocks and stones from amethyst and agate to sapphires and even diamonds.

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Dumortierite is an orthorhombic, fibrous aluminum borosilicate mineral (Al 7 BO 3 (SiO 4) 3 O 3) that typically forms slender prismatic crystals with spectacular color and pleochroism. The crystals ...