Bubbles and swirls in moldavite (natural glass)

Inclusions of hematite in feldspar (sunstone), India

Dendrites in agate

Twin-crystal of chrysoberyl

Midge included in amber from the Baltic coast, polarised light

Inclusions of hematite in aquamarine, Tanzania

Dumortierite in rock crystal, Brazil, polarised light

Agate from Anzi, Maroc

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan