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HomeIGC 2025Bertrandite in Emeralds
17. Nov
IGC 2025

Bertrandite in Emeralds

Shane F. McClure
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EmeraldTreatments
17. Nov
IGC 2025
Automated Data Processing of Raman Spectra for Supporting Spinel Origin Determination

pinel is a highly valued gemstone, with its color and quality influenced by trace-element chemistry

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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
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

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

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