Partially etched, gemmy 3.5cm Tanzanite crystal attached to exceptionally well formed Prehnite. The Tanzanite is undamaged and there is contacting on the edge of the Prehnite cluster. This specimen is an example of the some the great Prehnite that has been coming out of Merelani recently featuring highly translucent, thick blocky crystals. There are some additional etched Tanzanite fragments on the Prehnite.