Two-phase inclusions in tourmaline from Namibia

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

Structure in a healing fissure in topaz from Brazil

Fire opal, Mexico

Agate from Reichweiler, Germany

Twin-crystal of chrysoberyl

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Inclusions of gilalite aggregates in rock crystal from Brazil

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan