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Manganese oxides in quartz.
Description from the source:
Mn oxides included in Quartz. Minas Gerais, Brazil. 6x2,5x2,5 cm; 40 g.
Source:
Simone Citon
Contributor:
John Gray
Acquired:
26 October, 2008
Text Updated:
26 October, 2008
Price:
Trade
Size:
2.4"
Composition:
Mn
O
2
+
Si
O
2