Dumortierite in rock crystal, Brazil, polarised light
Dendrites in agate
Partially etched diamond crystal
Spinel crystal in dolomite marble, Burma
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Inclusions of anatase crystal and rutile fibres in rock crystal from Brazil
Two-phase inclusion in amethyst, Brazil
Twin-crystal of chrysoberyl

Zone interne

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