Alcatraz Penitentiary - 2.603" Showcase Concrete rockinaboxquartzpendant This chapter in life's evolutionary

This chapter in life's evolutionary history marked the rise of amniotes

including rare Hydrophilus and showcase fossils

and because the sand and the shells are essentially the same size

temperate range encompassing most of today's Lower 48 States and which extended deep into Mexico

Above: It's big

Alcatraz Penitentiary - 2.603" Showcase Concrete rockinaboxquartzpendant This chapter in life's evolutionaryThis is an authentic piece of concrete from Alcatraz Penitentiary. Yes, an actual piece of The Rock!" This particular specimen measures 2. 603" 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.