By definition a coin is circulated if you found it in change.
If you mean how do you tell the grade of a coin, that's a much more complex question. Grading is an art as well as a science that can't be easily described in words. You can check a book such as the famous Red Book Guide for general information on grading, or something like Photograde for more specific information.
It is out of circulation if someone has it in a collection or just tucked away in his "penny jar." An older coin that is still in Very Fine or better condition has probably spent much of its life "out of circulation."
By looking at the coin. Modern coins made for circulation have the mintmarks on the front. P= Philadelphia. D=Denver.
The largest denomination British coin in circulation is the Five Pound (Crown) coin, although it is intended to be a commemorative coin and is not generally accepted as a "general circulation" coin.The largest denomination British coin in general circulation is the Two Pound coin.
In the UK, the highest value coin in current wide circulation is the £2 coin.
It was the 20pence coin
The coin is still in circulation and only a dollar.
Any signs of wear indicate coin circulation. Look at the year the penny was made, and compare the it with the wear. You can definitely tell if a penny has been used just by looking at it.
If you got it in circulation no.
If by "new" you mean a decimal coin, the Half New Penny and Half Penny coin was in circulation from 1971 to 1983. The 25 Pence (Crown) coin was only issued in 1972, 1977, 1980 and 1981 and was intended to be a commemorative rather than a circulation coin. The Five Pound Crown replaced the niche of the 25 Pence Crown in 1990. The uni-metallic Two Pound coin was issued in 1986, 1989, 1994, 1995 and 1996 and was intended to be a commemorative rather than a circulation coin. The general circulation bimetallic Two Pound coin was first issued in 1997.
No British general circulation coin will contain any precious metal. If the coin is silver or any other precious metal, it will say so on the packaging the coin came in and on the Certificate of Authenticity that possibly came with the coin when it was purchased.
The circulation of a coin does not drop its value eg. 50p coins from 2012 Olympics.
The average dollar bill is in circulation for 21 months. and they have to be replaced because of wear. The average coin stays in circulation for 30 years, depending on denomination.