Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:PUMPELLYITE-(Mg)
Formula:Ca2MgAl2(SiO4)(Si2O7)(OH)2 · H2O
Crystal System:Monoclinic
Strunz Nr:8/C.24-30
Group:Pumpellyite Group
References:AM 61 (1976), 176; AM 68 (1983), 1250; AM 77 (1992), 1307; HB2/2 (1995)
Type Locality:Keweenawan copper deposit, Lake Superior, Michigan, USA

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