Dumortierite in rock crystal, Brazil, polarised light
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Two-phase inclusions in sapphire, Sri Lanka
Two-phase inclusions in tourmaline from Namibia
Inclusions of hematite in aquamarine, Tanzania
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Two-phase inclusion in amethyst, Brazil
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan

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