Pentagonite

The Wagholi Quarry outside of Pune, India is one of the only localities that produce display quality Pentagonite.  Pentagonite is a rare silicate mineral, named for the unusual twinning which produces pseudo pentagonal symmetry. It is a dimorph of cavansite, but is distinct because it develops these long needle-like prisms that stick out from the main cluster. Has an almost neon blue hue!