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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Learn how the structure, inclusions and properties of some gemstones interact with light to create unusual visual effects.
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US seasonal sales predictions are better than expected. Sotheby’s Hong Kong auction features a 100 ct yellow diamond necklace by GIA alumna Anna Hu.
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GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.
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G&G announces the winners of the Dr Edward J. Gübelin Most Valuable Article Awards for 2019.
Read MoreTraditionally, sapphire symbolises nobility, truth, sincerity and faithfulness.
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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
Read MoreSapphire is one of the big three of coloured gemstones (the other two are ruby and emerald). This durable gemstone captures jewellery buyers with its practicality and aura of romance. Click here to find out more about the factors that make sapphire so desirable!
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