Alcatraz Penitentiary - SOLD 3.084" Showcase Concrete plesiosaurteeth • Side-seamed construction

• Side-seamed construction

ejecting material that becomes a new meteorite in turn

The Companion Guide for AGE OF DINOSAURS is a full-color

The specimen is enclosed in an acrylic specimen jar with a removable top which arrives in a handsome

Alcatraz Penitentiary - SOLD 3.084" Showcase Concrete plesiosaurteeth • Side-seamed constructionThis is an authentic piece of concrete from Alcatraz Penitentiary. Yes, an actual piece of The Rock!" This particular specimen measures 3. 084" 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.