Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Inclusions of gilalite aggregates in rock crystal from Brazil
Midge included in amber from the Baltic coast, polarised light
Colour zoning in ruby from Mong-Shu, Burma
Two-phase inclusions in tourmaline from Namibia
Agate from Reichweiler, Germany
Inclusions of hematite in aquamarine, Tanzania
Twin-crystal of chrysoberyl


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