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

Agate from Reichweiler, Germany

Twin-crystal of chrysoberyl

Partially etched diamond crystal

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Two-phase inclusions in sapphire, Sri Lanka

Dumortierite in rock crystal, Brazil, polarised light

Fluid inclusions in quartz with bituminous daughter minerals, China