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

Dendrites in agate

Structure in a healing fissure in topaz from Brazil

Bubbles and swirls in moldavite (natural glass)

Twin-crystal of chrysoberyl

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

Inclusion of apatite in ruby from Tanzania

Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

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