Metatorbenite

This is a rarely seen specimen of metatorbernite from near Hillside, Arizona, a locality not typically known for producing this mineral. Metatorbernite is the dehydrated form of torbernite, a radioactive green copper uranyl phosphate that forms as a secondary mineral in uranium-bearing deposits such as granites. Under magnification, the tiny square-shaped blades exhibit a bright neon green colour with a slightly pearlescent lustre. The crystals are safely nestled in the concave host rock, providing their protection. This specimen offers a fascinating glimpse into the complex secondary mineral formations associated with uranium deposits.