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Alpersite
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| Mineral: | Alpersite: (Mg,Cu)SO4ยท7H2O | ||||
| Comments: | Bright blue efforescence associated with pickeringite, alunogen, and epsomite. Pickeringite and alunogen (white and yellow) occur on top of a matte of alpersite (blue) adjacent to a concrete wall. | ||||
| Location: | Big Mike mine, Nevada. | ||||
| Scale: | Picture size 50 cm. | ||||
| Copyright: | © American Mineralogist | ||||
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