Agate from Anzi, Maroc

Dendrites in agate

Twin-crystal of chrysoberyl

Structure in a healing fissure in topaz from Brazil

Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia

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

Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

Natural etching structure on a crystal face of diamond (trigons), polarised light

Inclusions of hematite in aquamarine, Tanzania