ring test A test used to determine whether a coin was struck or is an electrotype or cast copy. The coin in question is balanced on a finger and gently tapped with a metal object- a pen, another coin, and so on.
ring test: a method of determining if a coin is a cast counterfeit by tapping it with a pen or pencil. A genuine coin has a nice ring to it, like a tuning fork. A cast fake will give a dull thud.
Kennedy's mandate to land a man on the Moon before the end of the 1960s, Apollo 11 was an engineering test of the Apollo system; therefore, Armstrong snapped photos of the LM so engineers would be able to judge its post-landing condition.
This example has a clear ring, unlike most electrotypes which simply emit a dull thud when subjected to the ring test. Believed to be of Mint origin, and numismatically accepted as such. The specific gravity of 8.
to determine the difference between the alloys is to drop the coin on a counter
top. The tone emitted from the nickel alloy is different from the tone of
the silver alloy. This is called the "ring test." ...
 See also: Silver, Coin, Gold, Grade, Mint
  
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