Structure in a healing fissure in topaz from Brazil

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

Two-phase inclusions in sapphire, Sri Lanka

Midge included in amber from the Baltic coast, polarised light

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Spinel crystal in dolomite marble, Burma

Agate from Anzi, Maroc

«Red fox agate» from Patagonia, Argentina

Stress fissure («sun spangle») in baltic amber