Alcatraz Penitentiary - SOLD 2.52" Showcase Concrete quartz Developing the political support necessary

Developing the political support necessary to build such a monumental structure

Part of the vast Morrison Formation

Each hand-cut fragment is encased inside an acrylic specimen jar and presented in one of our classic

inspired by classic scientific samples used to study the composition of materials and geological stratigraphy

Alcatraz Penitentiary - SOLD 2.52" Showcase Concrete quartz Developing the political support necessaryThis is an authentic piece of concrete from Alcatraz Penitentiary. Yes, an actual piece of The Rock!" This particular specimen measures 2. 52" 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.