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

Spinel from Sri Lanka – An update

Gamini Zoysa, Dietmar Schwarz, Arunas Kleismantas

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Other Gemstones
17. Nov
IGC 2025
Zoisite and its many color

The mineral zoisite is a calcium alumosilicate belonging to the class of silicates, more exactly sor

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Elodie
17. Nov
IGC 2025
Application of Fibre Optics Reflectance Spectroscopy (FORS) for the determination of mineral pigments in jasper

The identification of pigments is carried out routinely mostly by X-ray diffraction, FTIR and Raman

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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

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