Specimen Details
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                            Collection NamesMining Department (G. Jervis Collection, 1887), Industrial and Technological Museum Collection 
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                            Number Of Specimens1 
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                            Rock NameFeldspar Muscovite Quartz Gneiss 
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                            Rock DescriptionA fine grained specimen composed of yellowish feldspar, grey quartz, and grey muscovite with minor flecks of black biotite. 
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