is it dust i think dust my dad says he doesn't have a clue :L
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
air cannot be seen because it is colourless
there is oxygen in air
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
The designs for all British 50 Pence coins can be seen at the Royal Mint link below.
Error coins need to be seen, take it to a collector or dealer. NOTE: coins are struck, not printed.
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.