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

Spinel crystal in dolomite marble, Burma

Structure in a healing fissure in topaz from Brazil

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

Agate from Reichweiler, Germany

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

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

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

Fire opal, Mexico