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Andelucite, named after Andalussia in Spain, has geological intreste due to it's strong pleochoism. Large piceses of gem quality stone are rare. It has a vitreous luster. It occurs in shists, genisses, and in river gravel. Cuttable qualities come from Brazil and Sri Lanka. Also from Canada (Quebec), Spain (Almeria/Andalusia), Russia and the U.S. (Main, Massachusetts). It can be confused with chrysoberyl, spokey quartz, and tourmaline.