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

Colour zoning in ruby from Mong-Shu, Burma

Dumortierite in rock crystal, Brazil, polarised light

Inclusions of gilalite aggregates in rock crystal from Brazil

Midge included in amber from the Baltic coast, polarised light

Fire opal, Mexico

Two-phase inclusion in amethyst, Brazil

Two-phase inclusions in sapphire, Sri Lanka

Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia