Perfect spherical cluster of translucent yellow Prehnite with a thin layer of Graphite and Pyrite on the bottom. Merelani Prehnite is among the best in the world, and specimens from recent finds such as this are among the best ever found at the locality. Solid Prehnite with large, gemmy crystals radiating out in all directions. The cluster is complete all around, translucent throughout, and undamaged.