Compression.
The weight of a 1908 Double Eagle is 33.436 grams. AGW is .96750oz of pure gold
When a coin is placed in water, light rays travel from water to air and get refracted. This refraction makes the coin appear to be nearer the surface of the water than it actually is. This is due to the change in speed of light as it moves from water to air, causing the coin to appear to be at a different position than its actual physical location.
The standard weight is 33.4 gm for an unworn $20 coin issued from 1849 to 1932.
The weight of this coin is 8.359 grams and has .24187oz pure gold. This standard is for all Half Eagles from 1839 to 1929.
All US 20 Dollar gold coins have a weight of 33.436 grams.
Do you mean a quarter DOLLAR? Quarter eagles were not issued in 1968. And could you describe "double 'stamped"" ? (note the term is actually "struck" in coin jargon).
Copies of bullion coins have no numismatic collectible value, most sell for $5.00 or less at coin shows.
That coin would have the grade "filler" Which means its to fill the hole in the coin book. Its worth about $20
It sounds to me like you have a MONEX INTERNATIONAL LTD. Bullion coin wich is what it is. 1 oz of pure silver. Approximatley a $20 coin.
The melting of a coin due to heat is a physical change as it alters the physical state of the coin from solid to liquid without changing its chemical composition. The black color that appears is likely due to the formation of an oxide layer on the surface of the coin, also a physical change.
Pounding a gold coin into a different shape would probably not effect a chemical change. If, however, the pounding produced enough heat to meal the coin, some chemical change could take place.
It could be a double-strike which means that the coin was stamped more than one time. Do some research or take it to your local coin dealer.
The 'Eagle Reverse" was last used in 1998 for the Washington quarters. Look at the reeding on the edge of the coin. You should see a seam an the reeds won't mach up. This is NOT a U.S. mint error coin. It has been altered and has no numismatic collectible value.
A Silver Eagle Bullion coin is 99.9% pure silver and weighs 1 oz per coin. The stamped value of the coin is U.S$1 however the intrinsic value of the coin is the value of the silver within that coin. If the the spot price of silver was $30oz at the time of checking, then the value of that coin would be worth at least $30 or more.
Although it has an Eagle on the reverse, the coin is not a Eagle coin, it's an 1885 Morgan dollar worth from $23.00-$30.00
Around the value of a JFK Golden Eagle coin.
Please report back to me and tell me the coin's denomination - is it a quarter eagle, a half eagle, etc. (?) and the coin's mint state.