Two-phase inclusions in sapphire, Sri Lanka

Twin-crystal of chrysoberyl

Dumortierite in rock crystal, Brazil, polarised light

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Bubbles and swirls in moldavite (natural glass)

Agate from Anzi, Maroc

Inclusions of gilalite aggregates in rock crystal from Brazil

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