Inclusion of apatite in ruby from Tanzania

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

Twin-crystal of chrysoberyl

Agate from Reichweiler, Germany

Bubbles and swirls in moldavite (natural glass)

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

Dendrites in agate

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

Spinel crystal in dolomite marble, Burma