Epigenetic inclusion (probanly melanterite) in quartz, Brazil, parallel polarisers
Midge included in amber from the Baltic coast, polarised light
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Dumortierite in rock crystal, Brazil, polarised light
Spinel crystal in dolomite marble, Burma
Twin-crystal of chrysoberyl
Colour zoning in ruby from Mong-Shu, Burma
Fire opal, Mexico

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