Twin-crystal of chrysoberyl

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Inclusions of hematite in aquamarine, Tanzania

Structure in a healing fissure in topaz from Brazil

Midge included in amber from the Baltic coast, polarised light

Agate from Reichweiler, Germany

Fire opal, Mexico

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

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