Planchet; flan (ancient coins)
The patterns on coinage are made by squeezing the coins metal blank between the faces of two hard presses into which the negative of the coins faces have been etched (called dies).
the process that coins go through when a blank is struck with a die
This type of error of misstruck coins is called 'Brockage'. A Lincoln penny with this error is valued at $35.00
Parallelogram prism
A proof coin is made from a highly polished planchet (blank) and struck twice to produce a highly detailed relief. Proof coins are not put into general circulation.
The patterns on coinage are made by squeezing the coins metal blank between the faces of two hard presses into which the negative of the coins faces have been etched (called dies).
FLAN
Not officially. However, the Mint has struck coins for other countries over the years. There have been many instances where a blank (technically called a "planchet") for a foreign coin accidentally got mixed in with blanks for U.S. coins and was struck with an American design, resulting in a planchet error.
the process that coins go through when a blank is struck with a die
No not "a blank", it is called a "reservoir".
The coins of Albania are called Lek.
It is: the 'least common denominator'
it is called a blank
dies
A person who collects coins is called a numismatist.
This type of error of misstruck coins is called 'Brockage'. A Lincoln penny with this error is valued at $35.00
CERVETERI, an ancient Etruscan town.