Sphalerite - Cumbria, UK - Boxed (No.RBX130)

Sphalerite

Nenthead, Cumbria, England.

Sphalerite is a zinc sulfide mineral also known as blende or zinc blende, a major ore of zinc. 

When there is an high amount of Iron, Sphalerite forms dark, opaque crystals, which are sometimes known as ‘Black Jack’ or Marmatite

Sphalerite can be found in various colours - Light to dark brown, red-brown, yellow, red, green, light blue, black and colourless.