Partially etched diamond crystal

Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia

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

Midge included in amber from the Baltic coast, polarised light

«Red fox agate» from Patagonia, Argentina

Inclusion of apatite in ruby from Tanzania

Fluid inclusions in quartz with bituminous daughter minerals, China

Dumortierite in rock crystal, Brazil, polarised light

Two-phase inclusions in sapphire, Sri Lanka