Alcatraz Penitentiary - 2.603" Showcase Concrete art Each specimen also includes an

Each specimen also includes an informational authenticity card

This specimen is a fragment of agatized coprolite from the Morrison Formation in Utah

Skull Dimensions: 14mm x 31mm x 18mm

The cluster measures 5

Knight's Sword

Alcatraz Penitentiary - 2.603" Showcase Concrete art Each specimen also includes anThis is an authentic piece of concrete from Alcatraz Penitentiary. Yes, an actual piece of The Rock!" This particular specimen measures 2. 603" along the widest point. This specimen, from the famous Alcatraz Island, saw some 1,500 prisoners pass by it during the prison's operation. A certificate of authenticity is included.