Midge included in amber from the Baltic coast, polarised light
Fire opal, Mexico
Colour zoning in ruby from Mong-Shu, Burma
«Red fox agate» from Patagonia, Argentina
Twin-crystal of chrysoberyl
Two-phase inclusions in tourmaline from Namibia
Spinel crystal in dolomite marble, Burma
Inclusions of hematite in feldspar (sunstone), India

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