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

Inclusion of apatite in ruby from Tanzania

Midge included in amber from the Baltic coast, polarised light

Partially etched diamond crystal

Inclusions of gilalite aggregates in rock crystal from Brazil

Structure in a healing fissure in topaz from Brazil

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

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

Colour zoning in ruby from Mong-Shu, Burma