Inclusion of apatite in ruby from Tanzania

Two-phase inclusion in amethyst, Brazil

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

Agate from Anzi, Maroc

Midge included in amber from the Baltic coast, polarised light

Spinel crystal in dolomite marble, Burma

Two-phase inclusions in tourmaline from Namibia

Bubbles and swirls in moldavite (natural glass)

Structure in a healing fissure in topaz from Brazil