Tour one of the world’s most active sapphire mining areas - the island of Madagascar - with GIA’s field gemmologist Vincent Pardieu.
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Visit gem mining areas in Madagascar, Kenya, Tanzania, Zambia and Mozambique with GIA’s field gemmologists.
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G&G announces the winners of the Dr Edward J. Gübelin Most Valuable Article Awards for 2019.
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Blue sapphire belongs to the mineral species corundum. It can be a pure blue but ranges from greenish blue to violetish blue. The name “sapphire” can also apply to any corundum that’s not red and doesn’t qualify as ruby, another corundum variety.
Read MoreThe name “sapphire” can also apply to any corundum that’s not ruby, another corundum variety
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Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
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Purplish Pink Spinel from Tajikistan: Before and After Cutting
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Trapiche emeralds, which display a distinct six-spoke wheel pattern, set the standard as some of the finest and most spectacular crystals ever unearthed.
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A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.
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A black star sapphire produced from eastern Thailand, showing both golden and silver rays, is studied at GIA’s Bangkok lab.
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