Origin: Numero uno mine San Benito co Calif USA.
size: 80 x 50 x 45 mm
weight: 56 gm.
Comments: Neptunite an extremely rare mineral is usually associated with Crossite and Natrolite and is rarely seen these days for sale. To have a specimen of this quality from this famous Californian site, with its perfect black monoclinic crystals is really going to make someone’s day. The picture speaks for itself.