Though the crystals are rather dull and coated, this specimen is notable not for crystal quality so much as for its prodigious size - this is just an amazingly thick "book" of vivianite crystals - 6 cm thick of densely-packed, ultra-thin layers - cannot say I have ever seen one like it! And, the specimen is DOUBLY-TERMINATED! There are small balls of childrenite here and there on the specimen. Ex. James Zigras collection.