Prehnite finger cast after Anhydrite Michigan I believe that this could

I believe that this could be a twinned crystal only because I can see what I would call a clear reentrant angle in the middle of the crystal

whitish color scalenohedra of Calcite along the edge of the specimen

nearly every crystal on this specimen is undamaged

A wonderful thumbnail specimen featuring a gemmy

Prehnite finger cast after Anhydrite Michigan I believe that this couldA beautiful miniature sized specimen with a central finger shaped cast with good luster, color and gemminess. The piece is associated with a few off white colored Calcite scalenohedra. Good quality for the material, and a worthwhile specimen from this fantastic discovery. 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 impressive display specimens,