Alcatraz Penitentiary - SOLD 2.52" Showcase Concrete quartz we have generally selected pieces

we have generally selected pieces that are similar to those pictured on the site (roughly 0

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

Developing the political support necessary to build such a monumental structure

and Dragons: The curious Mary Anning

Part of the vast Morrison Formation

Alcatraz Penitentiary - SOLD 2.52" Showcase Concrete quartz we have generally selected piecesThis 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.