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HomeIGC 2025Pink-orange gem quality euclase from Bahia, Brazil
17. Nov
IGC 2025

Pink-orange gem quality euclase from Bahia, Brazil

Lætitia Gilles-Guéry

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Other Gemstones
17. Nov
IGC 2025
Shining light on “480 nm band” diamonds: Gemmological characteristics of an unusual group of diamonds with yellow and red luminescence

Fancy colour diamonds that derive their colour from nitro- gen-related defects (such as N3/N2 center

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Elodie
17. Nov
IGC 2025
Gems in Hellenistic and Roman Jewellery of Northern Greece: An investigation from the Collections of the Archaeological Museum of Thessaloniki, Greece

This study presents the results of an interdisciplinary archaeogemological investigation focusing on

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Laurent Cartier
17. Nov
IGC 2025
HFSE-enriched sapphires of gem quality: A combined FTIR and trace element study and implications for heat treatment detection

Gem-quality sapphires containing ‘exotic’ elements such as Sn, Nb, Zr, Ta, W, are of special int

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Elodie

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