| UU ((Ore Specimen of ARSENOPYRITE, PYRRHOTITE, CUMMINGTONITE)), $5 MINIMUM BID, 5450 level, Homestake Mine, Lead, South Dakota, 10 x 8 x 2 cm, Cabinet, HMiniature | |
 | Here is a good ore grade specimen with Arsenopyrite, Pyrrhotite, and Cummingtonite with Quartz and Biotite. ex University of Utah geological science and geophysics department. |
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