Partially etched diamond crystal

Inclusions of gilalite aggregates in rock crystal from Brazil

Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania

Midge included in amber from the Baltic coast, polarised light

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

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Inclusion of apatite in ruby from Tanzania

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

Dumortierite in rock crystal, Brazil, polarised light