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Home2025October
24. Oct
IGC 2025

Low Temperature Heat Treatment of Madagascar Sapphire

E. Billie Hughes and Rosey Perkins Download Pdf

SapphireTreatments
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Elodie
24. Oct
IGC 2025

Dyed purple Jade (Lavender jade or purple “Fei Cui”) from Mandalay’s jade market, Myanmar

Montira Seneewong-Na-Ayutthaya, Bhuwadol Wanthanachaisaeng, Thanapong Lhuaamporn, Waratchanok Suwanmanee, Wilawan Atichat, and Thanong Leelawatanasuk Download Pdf

Jade
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Elodie
24. Oct
IGC 2025

Cross-Cultural Provenance and Characterization of Turquoise Artefacts: A Multi-Analytical Non-Destructive Study of Reshui Tomb Cluster, China (744 AD) and Tepeh Zagheh, Iran (5200–4200 BCE)

Bahareh Shirdam, Yang Mingxing, Andy Hsitien Shen, Hassan Fazeli Nashli Download Pdf

Other Gemstones
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Elodie
24. Oct
IGC 2025

Hurlbutite from Myanmar

Gravier D., Delaunay A., Boemo J., Arlabosse J.-M., Fritsch E., S. Karampelas Download Pdf

Other Gemstones
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Elodie
24. Oct
IGC 2025

Advancing Fei Cui Origin Authentication: A comparison of green fei cui from Myanmar, Guatemala, Italy and Russia

Shang-I (Edward) Liu, Ka-Yi (Angela) Man, Montira Seneewong-Na-Ayutthaya, Bhuwadol Wanthanachaisaeng Download Pdf

Jade
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Elodie
2025
IGC 2025

Amber and its treatments: A New Baltic Amber Classification Chart

Costanzo A., Klikowicz-Kosior A., Kosior M. Download Pdf

Other Gemstones
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Elodie
24. Oct
IGC 2025

Found, Lost, and Found Again: The Geological and Gemological Significance of the Salininha Emerald Deposit, Brazil

Rainer Alois Schultz-Güttler, Andressa Roberta Borotti, Ivan Pereira Marques, André Luiz Silva Pestilho Download Pdf

Emerald
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Elodie
24. Oct
IGC 2025

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

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

Tourmaline
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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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