Spinel crystal in dolomite marble, Burma

Dumortierite in rock crystal, Brazil, polarised light

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

Two-Phase inclusions and rutile needles in rock crystal from Brazil

Inclusions of hematite in aquamarine, Tanzania

Two-phase inclusions in sapphire, Sri Lanka

Midge included in amber from the Baltic coast, polarised light

Inclusions of gilalite aggregates in rock crystal from Brazil

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