Two-phase inclusions in sapphire, Sri Lanka
Agate from Reichweiler, Germany
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Twin-crystal of chrysoberyl
Fire opal, Mexico
Two-phase inclusion in amethyst, Brazil
Bubbles and swirls in moldavite (natural glass)

Zone interne

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