Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
Dumortierite in rock crystal, Brazil, polarised light
Partially etched diamond crystal
Inclusions of gilalite aggregates in rock crystal from Brazil
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Stress fissure («sun spangle») in baltic amber
Two-phase inclusions in tourmaline from Namibia
Inclusions of fossil plant debris in opal from Wollo, Ethiopia

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