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HomeIGC 2025Typomorphic features of tourmalines of the Malkhan pegmatite field from the Irkutyanka vein
17. Nov
IGC 2025

Typomorphic features of tourmalines of the Malkhan pegmatite field from the Irkutyanka vein

A.Y. Shelementyeva, Y.B. Shelementyev, O.V. Yarapova

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Tourmaline
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
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
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

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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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