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

Two-phase inclusion in amethyst, Brazil

Two-phase inclusions in sapphire, Sri Lanka

Inclusions of hematite in aquamarine, Tanzania

Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers

Structure in a healing fissure in topaz from Brazil

Dendrites in agate

Two-Phase inclusions and rutile needles in rock crystal from Brazil

Bubbles and swirls in moldavite (natural glass)