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HomeIGC 2025History of Garnet Mining and Cutting in the Austro-Hungarian Monarchy
17. Nov
IGC 2025

History of Garnet Mining and Cutting in the Austro-Hungarian Monarchy

Karl Schmetzer

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GemmologyOther Gemstones
17. Nov
IGC 2025
Amber from the Thanbaya Gaing Coal Mine, Minbu Township, Magwe Region, Myanmar

Amber was recently discovered by local coal miners at the Thanbaya Gaing Coal mine located 6.5 km no

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Laurent Cartier
17. Nov
IGC 2025
On the nature of blue rose quartz

Over the past several years, the market for pink-coloured rose quartz has been augmented by variants

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Laurent Cartier
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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