Inclusions of hematite in feldspar (sunstone), India

Fluid inclusions in quartz with bituminous daughter minerals, China

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

Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

Two-phase inclusion in amethyst, Brazil

Inclusion of apatite in ruby from Tanzania

«Red fox agate» from Patagonia, Argentina

Partially etched diamond crystal

Midge included in amber from the Baltic coast, polarised light