GRD01Y4S0
M-58
Impure Marble
Unknown
None
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0
Ritter 154 › Cabinet 14 › Drawer J
coarse-grained
Coarse-grained calcite with small metallic oxide crystals; some oxides have a rust halo while others do not. Perhaps the latter is molybdenite?. See also M-59 and M-211
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