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

Two-phase inclusions in tourmaline from Namibia

Inclusions of fossil plant debris in opal from Wollo, Ethiopia

Dendrites in agate

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

Inclusions of hematite in feldspar (sunstone), India

Inclusions of gilalite aggregates in rock crystal from Brazil

Midge included in amber from the Baltic coast, polarised light

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