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RM2557 Ludwigite
Radial aggregates of ludwigite crystals, a rare magnesium iron borate. It is accompanied by pyrite. Usually many of these specimens have been acidified, this is not the case. It belongs to the collection of Joan Astor, with a handwritten label.
Size: 7.8 x 5.3 x 2.4 cm.
Found in ±1979.
Col. J. Astor, Barcelona.
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