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HomeIGC 2023Colour change Paraiba tourmaline from Brazil
23. Oct
IGC 2023

Colour change Paraiba tourmaline from Brazil

By Claudio C. Milisenda, Stefan Müller

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Tourmaline
23. Oct
IGC 2023
Quantitative estimation of spinel’s thermal and geothermal history by photoluminescence spectroscopy and its application in spinel origin determination

The thermal history of spinel can not only be used to distinguish the natural spinel from heated and

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Elodie
23. Oct
IGC 2023
Phase transformations as important markers for heat treatment detection in corundum and other gemstones

Detection of heat treatment of ruby and sapphire and other colour varieties of corundum is a major i

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Elodie
23. Oct
IGC 2023
CVD Rough Diamonds Striae Grading Approach based on Deviated Optical Performance of Polished CVD Diamonds

Diamond’s optical performance cognition and scientific descriptions are based on the three key att

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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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