Spinel crystal in dolomite marble, Burma

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Dendrites in agate

Inclusions of gilalite aggregates in rock crystal from Brazil

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

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

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

Two-phase inclusions in tourmaline from Namibia

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