46SiO2.6(N2,CO2).2(CH4,N2) |
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QUARTZ (Var: Chalcedony) pseudomorph after MELANOPHLOGITE Tower Hill Quarries |
QUARTZ (Var: Chalcedony) pseudomorph after MELANOPHLOGITE Tower Hill Quarries |
QUARTZ (Var: Chalcedony) banded agate with layer of pseudomorphs after MELANOPHLOGITE Tower Hill Quarries |