Inclusions of fossil plant debris in opal from Wollo, Ethiopia

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

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

Fire opal, Mexico

Inclusions of hematite in aquamarine, Tanzania

Spinel crystal in dolomite marble, Burma

Twin-crystal of chrysoberyl

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

Midge included in amber from the Baltic coast, polarised light