Spinel crystal in dolomite marble, Burma

Partially etched diamond crystal

Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil

Bubbles and swirls in moldavite (natural glass)

Two-phase inclusions in sapphire, Sri Lanka

Inclusions of gilalite aggregates in rock crystal from Brazil

Two-phase inclusions in tourmaline from Namibia

Inclusions of hematite in aquamarine, Tanzania

Twin-crystal of chrysoberyl