Prehnite

This is a beatiful soft lime-green prehnite cluster.  The crystals comprise the entire piece with very little matrix, if at all.  This type of prehnite is translucent, as you can see in the backlit photo.  It has great color and a powerful glow when backlit, so we highly recommend it is displayed as such.  
 
From Drâa-Tafilalet Region, Morocco.