Prehnite

Large, catepillar-like formation of Prehnite crystals. A very interesting specimen for it's unique form, distinct crystals, and coloration (way better than photos - the camera didn't pick up the blue green color well). New finds at Merelani have produced Prehnites with a color I've not seen before, sort of a mixture of both green and blue. This specimen features both typical lemon yellow and the new blue/green colored crystals. While most Prehnites from other parts of the world occur as botryoidal masses or spheres, Merelani produces well formed, distinct crystals, and this specimen is loaded wtih them. It has double-terminated clusters to 5cm and individual crystals to 3cm. There is one small smooth area where it contacted a Calcite crystal, otherwise it's a floater covered by crystals on all sides, with little if any damage. One of the best, if not the best, Merelani Prehnite I've had. Minor Pyrite and Graphite in association.