Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
Inclusions of hematite in aquamarine, Tanzania
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusion of apatite in ruby from Tanzania
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light
Two-phase inclusions in tourmaline from Namibia
Fluid inclusions in quartz with bituminous daughter minerals, China
Fire opal, Mexico

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