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HomeIGC 2025Identification of melee size synthetic coloured diamond for jewellery
17. Nov
IGC 2025

Identification of melee size synthetic coloured diamond for jewellery

Kentaro Emori, Hiroshi Kitawaki, Mio Hisanaga, Masahiro Yamamoto

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Diamond
17. Nov
IGC 2025
Study of “amethysts” from the French Crown Jewels

Stefanos Karampelas, Eloïse Gaillou, Annabelle Herreweghe, Ugo Hennebois, Farida Maouche, Romain Bo

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Laurent Cartier
17. Nov
IGC 2025
Diamonds from Than Lwin River near Mong Hsu, Myanmar

Sixteen rough diamonds were acquired in 2023 by co-author TTS from a gem dealer linked to Mong Hsu,

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Elodie
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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