Explore GIA’s collection of free, rare digital books and manuscripts that document the history of gems and jewellery.
Read MoreThis article, from the Winter 1991 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.
Read MoreLearn about Turquoise's durability and how to care for your Turquoise jewellery.
Read MoreTurquoise might lack the sparkle and clarity of transparent coloured gemstones like ruby, emerald and sapphire, but its multi-layered history and soul-satisfying colour make it a desirable gem. Its colour can range from dull greens to grass greens to a bright, medium-toned, sky blue
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