You rub the edge on a rough brick wall, if it is grey or silverish under neath, it is not real gold , if it still looks gold underneath, that it OS most probably real
That is testing the hardness.
Gold is softer than most metals.
people used to test gold coins by biting them so see if they would dent explain how biting a coin could be used as a test for pure gold
It depends on which denomination coin you have. A $10 coin has more gold than a $5 coin.
The coin is brass not gold, the names are on the front of the coin.
If the coin is dated between 1840-1907 there is .12094oz pure gold in the coin.
If the coin is a modern gold bullion coin it is 1/4oz of pure gold. If it's a pre-1933 coin it has .48375oz of pure gold in it.
You rub the edge on a rough brick wall, if it is grey or silverish under neath, it is not real gold , if it still looks gold underneath, that it OS most probably real
Such a coin isn't a real coin and has absolutely no collector value. Rather any value comes from the precious metal content (if any) in the coin. I would take it to a jewelry store or a refiner and have them test it and see how much gold is in it (if any) and then sell it for the price of gold because such a "coin" has no collector value at all.
a gold coin of course Heads or Tails ? A gold coin
there is a gold coin in the fountain with the planets on the plate
It is not a coin made in a mint because it has no date on it, but if you want to find out more about it take it to a pawn shop. They will do an acid test on it to see if it's real gold.