Inclusions of gilalite aggregates in rock crystal from Brazil
Partially etched diamond crystal
Natural etching structure on a crystal face of diamond (trigons), polarised light
Two-phase inclusions in tourmaline from Namibia
Inclusion of apatite in ruby from Tanzania
Midge included in amber from the Baltic coast, polarised light
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Inclusions of rock crystal and rutile needles in quartz, Brazil, polarised light

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