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

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

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

Fire opal, Mexico

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia

Inclusions of hematite in aquamarine, Tanzania

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