Carletonite from this locality set the world standard, and nothing like these "TV style" cubes has been found since, here or anywhere. I believe this is from the famous glory holes of the 1980s when specimen collecting was at its height here. The piece is rather large for what we usually see, and shows a nice phantom effect inside. A rarity, Ex. Marty Zinn thumbnail collection (his old one, sold off years ago, not the new one abuilding currently).