Prehnite finger cast after Anhydrite Ferberite the Opals themselves are colorless

the Opals themselves are colorless

Ahlfeld worked the San Jose mine and Itos mine (the other significant Andorite locality at the same mountain in Oruro) when the mines were used predominantly as a major source of tin to the United States during WWII

It goes without saying that specimens of Phosphophyllite with crystals this size can be exceptionally pricey in some cases

Specimen #VIVBOL81813

native Copper is rather rare in my experience

Prehnite finger cast after Anhydrite Ferberite the Opals themselves are colorlessA representative specimen of Prehnite fingers after Anhydrite with a darker green color, and a coating of a secondary clay mineral. Overall, the piece is actually in good condition, with a predominant finger flaring out of the center of the piece. The color in the photos is accentuated by the lighting we used to photograph the piece, but it is a bit more muted in person. The Prospect Park Quarry is arguably the most famous mineral producing basalt