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if one were to shine a very bright light
one of the most momentous Prehnite discoveries was made at the Prospect Park Quarry
large crystals
The species was named after Basilius Valentinus
Siderite on Galena Orthoclase if one were to shineFrom the collection of well known Colorado mineral collector, George Robertson. My dad traded this piece from George in the early 1980s. The piece features dozens of rosettes of tan Siderite which are sitting atop rather lustrous, well formed, cuboctahedra of Galena on Sphalerite and Pyrite matrix. The Julia Fisk Mine is one of the more notable specimen producing mines in the Leadville District, especially since it was one of the few Leadville mines
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