Alcatraz Penitentiary - 3.019" Showcase Concrete rockinaboxalcatraz RAW EMERALD (Colombia)

RAW EMERALD (Colombia)

Coral is a marine invertebrate that builds an exoskeleton from calcium carbonate in communal formations

Split specimens are precision cut to reveal the interior spiral

953" wood fragment of the original 1923 sign salvaged during the reconstruction

In Pleistocene North America

Alcatraz Penitentiary - 3.019" Showcase Concrete rockinaboxalcatraz RAW EMERALD (Colombia)This is an authentic piece of concrete from Alcatraz Penitentiary. Yes, an actual piece of The Rock!" This particular specimen measures 3. 019" 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.