Natural etching structure on a crystal face of diamond (trigons), polarised light
Dumortierite in rock crystal, Brazil, polarised light
Fire opal, Mexico
Bubbles and swirls in moldavite (natural glass)
«Red fox agate» from Patagonia, Argentina
Two-phase inclusion in amethyst, Brazil
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Inclusions of hematite in aquamarine, Tanzania

Area riservata

Settore riservato ai membri/soci