Twin-crystal of chrysoberyl
Agate from Anzi, Maroc
Natural etching structure on a crystal face of diamond (trigons), polarised light
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Inclusion of apatite in ruby from Tanzania
Inclusions of gilalite aggregates in rock crystal from Brazil
Bubbles and swirls in moldavite (natural glass)
Dumortierite in rock crystal, Brazil, polarised light

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