Fire opal, Mexico
Dumortierite in rock crystal, Brazil, polarised light
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Two-phase inclusions in sapphire, Sri Lanka
Agate from Reichweiler, Germany
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

Contact

Societé Suisse de Gemmologie
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c/o BDO AG, Hodlerstrasse 5, 3001 Bern

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