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produced over 5 million Troy ounces of Gold and Silver combined in nearly a century
Specimen #PREH3117
On the back and bottom of the specimen
This is one of the very few specimens of Franckeite that I have seen from the famous Siglo XX mine
Prehnite finger cast after Anhydrite Wolframite produced over 5 million TroyA classic, single finger shaped cast of Prehnite after Anhydrite with good luster on the display side, and a slight coating of a secondary clay mineral on the back. The underside of the piece shows the square cross section of the once preexisting Anhydrite crystal that was the base for the cast. The Prospect Park Quarry is arguably the most famous mineral producing basalt quarry in New Jersey and, for over a century, has provided collectors with
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