Pumpellyite Ca2MgAl2[(OH)2|SiO4|Si7]·(H2O), light green, with Epidote in Basalt, Oscola #6, Houghton Co., Michigan
Pumpellyite Ca2MgAl2[(OH)2|SiO4|Si7]·(H2O), light green, detail, with Epidote in Basalt, Oscola #6, Houghton Co., Michigan
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