Dendrites in agate

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

«Red fox agate» from Patagonia, Argentina

Spinel crystal in dolomite marble, Burma

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

Two-Phase inclusions and rutile needles in rock crystal from Brazil

Fluid inclusions in quartz with bituminous daughter minerals, China

Agate from Reichweiler, Germany