Inclusions of hematite in aquamarine, Tanzania

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

Twin-crystal of chrysoberyl

«Red fox agate» from Patagonia, Argentina

Agate from Reichweiler, Germany

Dumortierite in rock crystal, Brazil, polarised light

Inclusions of gilalite aggregates in rock crystal from Brazil

Agate from Anzi, Maroc

Dendrites in agate