Two-Phase inclusions and rutile needles in rock crystal from Brazil

Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers

Midge included in amber from the Baltic coast, polarised light

Partially etched diamond crystal

Natural etching structure on a crystal face of diamond (trigons), polarised light

«Red fox agate» from Patagonia, Argentina

Fire opal, Mexico

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Bubbles and swirls in moldavite (natural glass)