Description: Orthoclase, Quartz, Zinwaldite, Dolomite Gebel Quarry (Mantegazza Quarry; Bianchi Quarry), Cuasso al Monte, Ceresio Valley, Varese Province, Lombardy, Italy 66.87 mm group composed from Orthoclase, smoky Quartz, yellow Dolomite and Zinnwaldite

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