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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
Gems in Greece: Geology, mineralogy and crystallizing environment

In the accretionary Hellenides Orogen, gems occur in various rock types of mainly four tectonometamo

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Laurent Cartier
17. Nov
IGC 2025
Bertrandite in Emeralds

Over the past few years we have been seeing more and more lower quality stones in the lab. The reaso

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Laurent Cartier
17. Nov
IGC 2025
Spinel from Sri Lanka – An update

Most of the spinels are found in shades of red to purple. Colourless, green and cobalt bearing varie

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Elodie

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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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