| dsa CHALCOPHANITE, (Zn,Fe,Mn)Mn3O7.3H2O, Gold Hill Mine, Tooele County, Utah, 6.5 x 4 x 2.5 cm | |
 | This specimen has small crystals of Chalcophanite and information on www.mindat.org has the chemical formula as (Zn,Fe,Mn)Mn3O7.3H2O. ex Otto Ray collection. |
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