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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
Mechanism and Application of High-Temperature Copper Diffusion in Surface Recoloring of Labradorites

Feldspar, with the chemical formula of [KAlSi3 O8 ]x[NaAlSi3 O8 ]y[CaAl2 Si2 O8 ]z (x + y + z = 100)

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Elodie
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
Crystal structure of nano inclusions in blue sapphire from Diego Suarez, Northern Madagascar

Nano inclusions in unheated blue sapphire (Diego Suarez, northern Madagascar) containing naturally o

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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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