Alcatraz Penitentiary - 2.604" Showcase Concrete bags Remove surface dust with a

Remove surface dust with a clean

Billions of years pass before the first stirrings of life

This specimen is an authentic fragment of fossil dinosaur dung

88" polished Phylloceras fossil from Madagascar

it will be replaced by a 29-Specimen version

Alcatraz Penitentiary - 2.604" Showcase Concrete bags Remove surface dust with aThis is an authentic piece of concrete from Alcatraz Penitentiary. Yes, an actual piece of The Rock!" This particular specimen measures 2. 604" 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.