From your description the coin is a 1921 Morgan dollar and it's the most common of all Morgan dollars. Values are $16.00-$19.00 retail depending on the condition of the coin.
what is a 1921 liberty head gold one dollar coin worth
If the coin is a real Morgan or Peace dollar. The value is just for the silver, about $20.00.
In 1921 two types silver dollars were issued and the values are very different. If the coin has the motto E PLURIBUS UNUM above Liberty's Head it's a Morgan dollar and the value is $37.00-$41.00 for a circulated coin. If the coin has the word Liberty above her head it's a Peace dollar and the value for a circulated coin is $80.00-$175.00 Both coins are dated 1921.
If the coin has the motto E PLURIBUS UNUM above Liberty's Head it's a Morgan dollar and the value is $29.00-$38.00 for a circulated coin. If the coin has the word Liberty above her head it's a Peace dollar and the value for a circulated coins $80.00-$175.00. Both coins are dated 1921
If the coin has the motto E PLURIBUS UNUM above Liberty's Head it's a Morgan dollar and the value is $14.00-$19.00 for a circulated coin. If the coin has the word Liberty above her head it's a Peace dollar and the value for a circulated coins $80.00-$175.00 Both coins are dated 1921
what is a 1921 liberty head gold one dollar coin worth
The motto E Pluribus Unum (3 separate words) is on all US coins so it doesn't really ID any one in particular. Please see the Related Question for more about 1921 Morgan dollars.
If the coin is a real Morgan or Peace dollar. The value is just for the silver, about $20.00.
The coin is very common with retail values of $17.00-$26.00
In 1921 two types silver dollars were issued and the values are very different. If the coin has the motto E PLURIBUS UNUM above Liberty's Head it's a Morgan dollar and the value is $37.00-$41.00 for a circulated coin. If the coin has the word Liberty above her head it's a Peace dollar and the value for a circulated coin is $80.00-$175.00 Both coins are dated 1921.
If the coin has the motto E PLURIBUS UNUM above Liberty's Head it's a Morgan dollar and the value is $29.00-$38.00 for a circulated coin. If the coin has the word Liberty above her head it's a Peace dollar and the value for a circulated coins $80.00-$175.00. Both coins are dated 1921
If the coin has the motto E PLURIBUS UNUM above Liberty's Head it's a Morgan dollar and the value is $14.00-$19.00 for a circulated coin. If the coin has the word Liberty above her head it's a Peace dollar and the value for a circulated coins $80.00-$175.00 Both coins are dated 1921
twenty one dollars
Please check your coin again. 1921-dated Peace dollars were only struck at Philadelphia. If your coin has a "D" above the "DO" in "DOLLAR" and the eagle's wings are outstretched, you have a Morgan dollar rather than a Peace dollar. There's more information at the question "What is the value of a 1921 Morgan silver dollar?"
If the coin has the motto E PLURIBUS UNUM above Liberty's Head it's a Morgan dollar and the value is $30.00-$38.00 for a circulated coin. If the coin has the word Liberty above her head it's a Peace dollar and the value for a circulated coin is $80.00-$175.00 Both coins are dated 1921
The actual value would be based on the worth of each coin in the set.
If the coin has the motto E PLURIBUS UNUM above Liberty's Head, it's a Morgan dollar and the value is $30.00-$38.00 for a circulated coin. If the coin has the word Liberty above her head it's a Peace dollar and the value for a circulated coin is $80.00-$175.00 This was the last year for Morgan dollars and the first year for Peace dollars. Both coins are dated 1921.