Descripción: Mineral: Staurolite Description: Penetration twin on {031} Location: Bretagne, France Author: Lacroix, 1893, and others. In: V.M. Goldschmidt, Atlas der Krystallformen, 1913-1923. System: Monoclinic, point group: 2/m Cell: a: 0.469, b: 1, c: 0.34, alpha: 90, beta: 90, gamma: 90 imagen©Smorf

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