Partially etched diamond crystal

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

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

Bubbles and swirls in moldavite (natural glass)

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil

Two-phase inclusions in tourmaline from Namibia

Midge included in amber from the Baltic coast, polarised light

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