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Two-phase inclusion in amethyst, Brazil
Structure in a healing fissure in topaz from Brazil
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Bubbles and swirls in moldavite (natural glass)
Midge included in amber from the Baltic coast, polarised light
Dendrites in agate
Partially etched diamond crystal
Inclusions of hematite in aquamarine, Tanzania
Fluid inclusions in quartz with bituminous daughter minerals, China
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
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