Two-phase inclusion in amethyst, Brazil

«Red fox agate» from Patagonia, Argentina

Dumortierite in rock crystal, Brazil, polarised light

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

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

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

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Midge included in amber from the Baltic coast, polarised light