Fire opal, Mexico

«Red fox agate» from Patagonia, Argentina

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

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

Agate from Reichweiler, Germany

Inclusion of apatite in ruby from Tanzania

Agate from Anzi, Maroc

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Inclusions of fossil plant debris in opal from Wollo, Ethiopia