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

Bubbles and swirls in moldavite (natural glass)

«Red fox agate» from Patagonia, Argentina

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

Colour zoning in ruby from Mong-Shu, Burma

Inclusion of apatite in ruby from Tanzania

Agate from Anzi, Maroc

Structure in a healing fissure in topaz from Brazil

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