Inclusions of fossil plant debris in opal from Wollo, Ethiopia

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

Partially etched diamond crystal

Agate from Reichweiler, Germany

Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

«Red fox agate» from Patagonia, Argentina

Two-phase inclusion in amethyst, Brazil

Midge included in amber from the Baltic coast, polarised light

Inclusions of gilalite aggregates in rock crystal from Brazil