Alcatraz Penitentiary - SOLD 2.52" Showcase Concrete dimetrodonbig This specimen is a piece

This specimen is a piece of a Pachycephalosaurus skull dome fossil recovered from the Hell Creek formation in South Dakota

ancient civilizations valued the beauty of opal

Making a book about specimens without actual specimens inside was something new for us

and earned Enchodus the nickname: “the saber-toothed herring

He was also responsible for making most of the commemorative displays for astronauts

Alcatraz Penitentiary - SOLD 2.52" Showcase Concrete dimetrodonbig This specimen is a pieceThis 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.