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

Partially etched diamond crystal

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Fire opal, Mexico

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

Two-phase inclusion in amethyst, Brazil

Spinel crystal in dolomite marble, Burma

Dumortierite in rock crystal, Brazil, polarised light

Two-phase inclusions in tourmaline from Namibia