“Large black anorthoclase crystal. The sample is internally colorless, but contains many scoriaceous inclussions and stains that provide the black color. Sample collected close the summit of the Uhuru peak, at 5860 m in height, by Alberto Fernando Juan Sebastián ("Kolorines"), from Zaragoza (Spain). August, 2000.”

“Large black anorthoclase crystal. The sample is internally colorless, but contains many scoriaceous inclussions and stains that provide the black color. Sample collected close the summit of the Uhuru peak, at 5860 m in height, by Alberto Fernando Juan Sebastián ("Kolorines"), from Zaragoza (Spain). August, 2000.”

“Large black anorthoclase crystal. The sample is internally colorless, but contains many scoriaceous inclussions and stains that provide the black color. Sample collected close the summit of the Uhuru peak, at 5860 m in height, by Alberto Fernando Juan Sebastián ("Kolorines"), from Zaragoza (Spain). August, 2000.”