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Structure in a healing fissure in topaz from Brazil
Dumortierite in rock crystal, Brazil, polarised light
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusion of apatite in ruby from Tanzania
Fluid inclusions in quartz with bituminous daughter minerals, China
Midge included in amber from the Baltic coast, polarised light
Agate from Reichweiler, Germany
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Colour zoning in ruby from Mong-Shu, Burma
Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
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