Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
Natural etching structure on a crystal face of diamond (trigons), polarised light
Partially etched diamond crystal
Inclusions of hematite in aquamarine, Tanzania
Fluid inclusions in quartz with bituminous daughter minerals, China
Agate from Anzi, Maroc
Dumortierite in rock crystal, Brazil, polarised light
Inclusions of fossil plant debris in opal from Wollo, Ethiopia

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