Dragon Minerals - Discounted Minerals

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29295: Stilpnomelane - Was $14   Now $7
French Creek Mines, Saint Peters, Warwick County, Chester County, Pennsylvania
Miniature - 4.9 x 3.6 x 1.9 cm
31 grams
Specimen status: Reserved
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Brown stilpnomelane microcrystalline crust, abundant on an orthoclase matrix. Stilpnomelane is an uncommon phyllosilicate - (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36┬ĚnH2O, for which French Creek was a classic locality. The locality is now extinct, having been removed, bulldozed, and otherwise destroyed in 1988 to make way for (what else?) a housing complex, called 'French Creek Mine Estates'. Specimens not abundant on the mineral market.

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