Two-phase inclusions in tourmaline from Namibia
Colour zoning in ruby from Mong-Shu, Burma
Two-phase inclusion in amethyst, Brazil
Dumortierite in rock crystal, Brazil, polarised light
Fire opal, Mexico
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Natural etching structure on a crystal face of diamond (trigons), polarised light
Epigenetic inclusion (probanly melanterite) in quartz, Brazil, crossed polarisers

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