Gold-plated, not gold. No US one dollar gold coins dated 1921 were ever struck. The Morgan design was used on silverdollars, so the good news is that the underlying silver coin is worth about $12 as of 04/2010. The bad news is that without the plating it would be worth about $17-20 to a collector.
If it has a head on both sides it's a novelty item called a magician's coin.
The good news is that if it was made from the front sides of 2 genuine silver dollars it's still worth around $10 for its silver content, as of 05/2009
Your coin is called a Peace dollar. "Eagles" are modern bullion coins minted since 1986 and sold to collectors and investors. Peace dollars were actually worth $1 at the time and were used in ordinary commerce.
Please see the Related Question for more information.
There were no $1 gold coins minted that year, and Peace dollars are silver. I suspect that some gold-plated the coin. Being that the coin has been altered and it's the most common date for Peace dollars, at current silver prices it's worth about $22.
The 1926-S Peace dollar is not scarce or rare, assuming it's circulated, average retail values are $30.00 to $49.00 depending on how much wear the coin has.
Assuming the coin has no mintark, the 1922 PEACE dollar is the highest mintage and most common coin of the series. Circulated examples are $31.00-$37.00
Assuming the coin has no mintark, the 1922 PEACE dollar is the highest mintage and most common coin of the series. Circulated examples are $23.00-$27.00
Assuming the coin has no mintark, the 1922 PEACE dollar is the highest mintage and most common coin of the series. Circulated examples are $31.00-$37.00.
The 1922 PEACE dollar regardless of mintmarks is the most common coin of the series, circulated coins are $22.00 to $26.00.
The coin is a 1922 Peace dollar not an E PLURIBUS UNUM coin, circulated coins have retail values of $16.00-$20.00.
7-10-11>>> The coin is a 1922 Peace dollar not an E PLURIBUS UNUM coin, this Latin phrase is the National Motto and is on all US coins dated 1922 to date. The 1922 Peace dollar is the most common coin of the series, circulated coins have retail values of $38.00-$41.00.
As of 26 October 2017, the melt value for a Peace silver dollar is $13.13.
The 1922 is probably a peace dollar. It would have the word peace on the side with the eagle. The 1921 is probably a Morgan dollar. It has a Liberty head on one side and an eagle on the other. These are worth about $25-35 on average.
The coin is NOT an Liberty silver dollar, it's a PEACE dollar (1921-1935) and assuming the coin is circulated and has no mintmark, retail values are $28.00-$32.00 the 1922 coin is the highest mintage most common date of the series.
Your 1922 Liberty dollar is actually a 1922 PEACE dollar. The 1922 date is the most common and assuming the coin is circulated and has no mintmark, as of 8-26-11, retail values are $37.00-$40.00 depending on how much wear the coin shows.
Dollars with "flowing hair" design were only struck in 1794 and 1795. Your coin is simply called a Peace dollar.
6-24-11>>> Assuming the coin has no mintark, the 1922 PEACE dollar is the highest mintage and most common coin of the series. Circulated examples are $36.00-$40.00.