Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Twin-crystal of chrysoberyl
Dendrites in agate
Agate from Reichweiler, Germany
Two-phase inclusion in amethyst, Brazil
Inclusions of hematite in aquamarine, Tanzania
Structure in a healing fissure in topaz from Brazil

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