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Yes, before being a federal prison, Alcatraz was used by the Army as a Disciplinary barracks for disorderly servicemen and, before that, as a fort intended for the defense of San Francisco Bay.
anything it is used for any where else
Actually it was. From 1850 to 1861, it was a military and naval base. And an important one. From 1861 to 1933, it was used as a POW prison, housing prisoners in the Civil War and the First World War. Then in 1934, it became a federal prison. In 1963, it was closed as a prison due to high running costs. In 1969 it was a community for native Americans. However they were kicked out in 1971. In 1972, it became a national park. And it still is today.
is aquamarine used for anything other than jewelry
Yes
The ears are also used for balance
Augite is used for ceramics. I couldn't find anything else than that...
To use as a door, chess board or anything else.
yes
target practice.
Because if they used anything else they wouldn't be skiers.
No its only used in cooking