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HomeIGC 2025Padparadscha Sapphire & heat treatment
17. Nov
IGC 2025

Padparadscha Sapphire & heat treatment

Stephen Kennedy

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SapphireTreatments
17. Nov
IGC 2025
Advancing Fei Cui Origin Authentication: A comparison of green fei cui from Myanmar, Guatemala, Italy and Russia

In recent years, an increasing number of sources of fei cui, such as Guatemala, Italy and Russia, ha

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Elodie
17. Nov
IGC 2025
Geographic Origin Determination of Natural Yellow Sapphires: The Preliminary Study

Determining the geographic origin of yellow sapphires plays a critical role in the gem trade, as ori

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Laurent Cartier
17. Nov
IGC 2025
Blue sapphire from Malacacheta of Minas Gerais, Brazil

Malacacheta, located in Minas Gerais, Brazil, is renowned for its alexandrite deposits and com-plex

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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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