Two-phase inclusions in sapphire, Sri Lanka
Structure in a healing fissure in topaz from Brazil
Two-phase inclusion in amethyst, Brazil
Colour zoning in ruby from Mong-Shu, Burma
Fire opal, Mexico
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Agate from Anzi, Maroc
Bubbles and swirls in moldavite (natural glass)

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