Midge included in amber from the Baltic coast, polarised light

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Natural etching structure on a crystal face of diamond (trigons), polarised light

Dendrites in agate

Two-phase inclusion in amethyst, Brazil

Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil

Partially etched diamond crystal

«Red fox agate» from Patagonia, Argentina

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