Structure in a healing fissure in topaz from Brazil

Dendrites in agate

Fluid inclusions in quartz with bituminous daughter minerals, China

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

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

«Red fox agate» from Patagonia, Argentina

Twin-crystal of chrysoberyl

Midge included in amber from the Baltic coast, polarised light

Agate from Anzi, Maroc