Alcatraz Penitentiary - SOLD 2.52" Showcase Concrete showcasejewelry2025sale20 This specimen comes from an

This specimen comes from an early 14th-century paving brick uncovered in the Cannaregio sestiere during a recent renovation

grinding in opposite directions for 750 miles

They are roughly 1/2" (2cm) in size

the creatures will be quite tiny if they are present

in the middle of the Paleolithic

Alcatraz Penitentiary - SOLD 2.52" Showcase Concrete showcasejewelry2025sale20 This specimen comes from anThis 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.