Fluid inclusions in quartz with bituminous daughter minerals, China
Stress fissure («sun spangle») in baltic amber
Partially etched diamond crystal
Midge included in amber from the Baltic coast, polarised light
Natural etching structure on a crystal face of diamond (trigons), polarised light
Dendrites in agate
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
«Red fox agate» from Patagonia, Argentina

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