Prehnite finger cast after Anhydrite Bert S. Butler To find a piece with

To find a piece with such great aesthetics is rare these days

This blue shade is rather rare in my experience with this material

This amazing “nail head”-shaped crystal was caused due to hydrothermal etching in the pocket after the crystal had formed

Several slender finger-shaped casts of Prehnite after Anhydrite in parallel growth make this an attractive large miniature / small cabinet display specimen

not only from Bolivia

Prehnite finger cast after Anhydrite Bert S. Butler To find a piece withAn eye catching small miniature sized specimen with a few thick, lustrous, gemmy, pleasing green color casts of Prehnite after Anhydrite. The piece has good balance and displays well from a few angles. The reverse side of the piece shows a small cavity where the Anhydrite once grew, proving that the fingers are indeed hollow inside. The Prospect Park Quarry is arguably the most famous mineral producing basalt quarry in New Jersey and, for over a