Agate from Reichweiler, Germany

Two-Phase inclusions and rutile needles in rock crystal from Brazil

Agate from Anzi, Maroc

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

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

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

Dendrites in agate

Two-phase inclusions in sapphire, Sri Lanka

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