Alcatraz Penitentiary - SOLD 2.77" Showcase Concrete eocene With a total recovered weight

With a total recovered weight at 220

Above: Front of specimen card

Beginning with rare gems formed in the heart of an asteroid during the formation of the solar system

(Source: Detlev Van Ravenswaay

The 9 Specimen (SMALL) Fourth Edition of the Mini Museum measures approximately 4" tall x 3" wide x 1" thick and contains 9 different specimens:

Alcatraz Penitentiary - SOLD 2.77" Showcase Concrete eocene With a total recovered weightThis is an authentic piece of concrete from Alcatraz Penitentiary. Yes, an actual piece of The Rock!" This particular specimen measures 2. 77" 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.