Colour zoning in ruby from Mong-Shu, Burma

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Inclusions of gilalite aggregates in rock crystal from Brazil

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

Midge included in amber from the Baltic coast, polarised light

Dumortierite in rock crystal, Brazil, polarised light

Two-phase inclusions in sapphire, Sri Lanka

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

Spinel crystal in dolomite marble, Burma