it was found in a dry river bed in lathkilldale near bakewell derbyshire. it is around 2 inches in width and is quite heavy for its size, there also appears to be some gold flecks on one side where it is broken.
hi thanks for your reply, i think your right, i did a little digging and. it seems to be mixed with a little chalcopyrite. found some images of the mix and the crystals look excactly the same. thanks you for your help..