Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Dumortierite in rock crystal, Brazil, polarised light
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Agate from Reichweiler, Germany
Inclusions of hematite in feldspar (sunstone), India
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Natural etching structure on a crystal face of diamond (trigons), polarised light

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