Alcatraz Penitentiary - 3.019" Showcase Concrete bundle These adaptations created a stronger

These adaptations created a stronger shell to protect the ammonite from predators millions of years ago

690" and was recovered from the Black Sea

Please Note: We have not stabilized this material with resin

It comes from the lunar meteorite NWA 5000 which originated on the light colored highlands of the Moon

a powerful asteroid crashes to the ground

Alcatraz Penitentiary - 3.019" Showcase Concrete bundle These adaptations created a strongerThis 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.