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

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

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

Colour zoning in ruby from Mong-Shu, Burma

Two-phase inclusions in tourmaline from Namibia

Spinel crystal in dolomite marble, Burma

Agate from Reichweiler, Germany

Inclusion of apatite in ruby from Tanzania

Midge included in amber from the Baltic coast, polarised light