Colour zoning in ruby from Mong-Shu, Burma
Partially etched diamond crystal
Two-phase inclusions in tourmaline from Namibia
Dumortierite in rock crystal, Brazil, polarised light
Inclusions of chrysotile fibres in demantoide garnet from Ural Mountains, Russia
Stress fissure («sun spangle») in baltic amber
Agate from Anzi, Maroc
Inclusions of hematite in feldspar (sunstone), India

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