Prehnite finger cast after Anhydrite Ferberite cream-colored Dolomite rhombs

cream-colored Dolomite rhombs

but you don’t see pieces like this anymore

the Opals themselves are colorless

and this beautiful multicolored gem crystal is no exception

this is also a great opportunity to obtain a good-sized single crystal of a species that is often only found in crude or microscopic crystals

Prehnite finger cast after Anhydrite Ferberite cream-colored Dolomite rhombsA 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