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HomeIGC 2025Low Temperature Heat Treatment of Madagascar Sapphire
17. Nov
IGC 2025

Low Temperature Heat Treatment of Madagascar Sapphire

E. Billie Hughes and Rosey Perkins

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SapphireTreatments
17. Nov
IGC 2025
Studying renowned fancy color diamonds in museum collections: the case of the Winston Red

Museums are unique repositories of international treasures. They are also places of active research,

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Elodie
17. Nov
IGC 2025
Found, Lost, and Found Again: The Geological and Gemological Significance of the Salininha Emerald Deposit, Brazil

The Salininha emerald deposit located in the municipality of Pilão Arcado, Bahia State, represents

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Elodie
17. Nov
IGC 2025
Gemological Characteristics of New Transparent Brown Sapphire

A newly observed variety of faceted transparent brown sapphire has recently entered the gem market,

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Laurent Cartier

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Age dating Diamond Emerald Gemmology Geochemistry IGC Jade Organics Origins Other Gemstones Pearl Ruby Sapphire Spinel Synthetics Tourmaline Treatments

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