Alcatraz Penitentiary - SOLD 3.084" Showcase Concrete fossilplant As each Mini Museum is

As each Mini Museum is hand-finished

0005 mm copper layer surrounds each filament for additional conductivity and protection

The body plan of the animal has been preserved in beautiful detail

Experimental detection of α-particles from the radioactive decay of natural bismuth

Medium - 1

Alcatraz Penitentiary - SOLD 3.084" Showcase Concrete fossilplant As each Mini Museum isThis is an authentic piece of concrete from Alcatraz Penitentiary. Yes, an actual piece of The Rock!" This particular specimen measures 3. 084" 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.