There is a nine letter symbol that is seen in the air and on coins. The symbol that is on both is the Bald Eagle, the United States National emblem.
Bald Eagle
is it dust i think dust my dad says he doesn't have a clue :L
Coins oxidize when exposed to oxygen in the air, leading to the formation of a layer of oxidation on their surface. This oxidation is typically seen as a greenish color, known as patina, which is caused by the reaction of the metal in the coin with oxygen and moisture in the air. The presence of copper in many coins makes them particularly prone to oxidation.
air cannot be seen because it is colourless
i seen some at CVS. !
50/50
If you mean, "why are they thicker than other coins?" it is so that the difference between coins of similar size can be seen and felt.
Keeping them out of the air will keep them shiny
Cesar
Error coins need to be seen, take it to a collector or dealer. NOTE: coins are struck, not printed.
The designs for all British 50 Pence coins can be seen at the Royal Mint link below.
You can go to Mattox Coins and Stamps in Raleigh. I did some business with them recently and they were by far the most professional that I have seen.