Two different types of silver dollars were issued in 1921 with very different values. This was the last year for Morgan dollars and the first year for Peace dollars. The simplest way to tell the two apart is on the reverse of a Peace dollar the eagle is standing on a rock with its wings folded, the Morgan has the wings spread out. Please post new question with more information.
A average Mint State 1921 Morgan is $30.00-$40.00
The intrinsic value is $14.16 with silver at $18.31 per ounce
The "Mercury" coin is a dime. In addition the P mint mark was first used on $1 coins starting in 1979 so that letter can't be on a 1921 dollar. A 1921 Morgan Dollar (eagle on reverse with spread wings facing forward) is the most common silver dollar and is valued by its silver content. A 1921 P Peace Dollar (eagle perched in profile) is one of the harder dates to find and is worth at least $50 badly worn and a few hundred if uncirculated.
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The Morgan dollar is named for its designer, George T. Morgan. They were minted from 1878 through 1904, then again for one year in 1921. As always, the value of a coin depends on its condition, its rarity, and sometimes its bullion value. The Morgan dollar contains .77344 oz of pure silver, and the value of silver changes from day to day. However, to a collector, the value of the silver content does not affect a coin's value as a collectors item. I looked online to see what 1921-S Morgans are selling for and they range from $50 in Fine condition to $60 in about Uncirculated.
A average Mint State 1921 Morgan is $30.00-$40.00
$24.00 to $35.00 for MS-60 to MS-63
They stopped making Morgan dollars in 1921.
The intrinsic value is $14.16 with silver at $18.31 per ounce
That is a Morgan Dollar and the 1921 series is by far the most common. In circulated condition it is worth around $22 for the price of silver in the coin. If uncirculated, it could, however, be worth a premium.
1922 silver dollar with closed eagle wings
This date is the most common of the Morgan silver dollars. The D is the mint mark from Denver were it was made. In circulated condition value runs from $14.00 to $18.00. Uncirculated coins have a retail value of only about $21.00.
The "Mercury" coin is a dime. In addition the P mint mark was first used on $1 coins starting in 1979 so that letter can't be on a 1921 dollar. A 1921 Morgan Dollar (eagle on reverse with spread wings facing forward) is the most common silver dollar and is valued by its silver content. A 1921 P Peace Dollar (eagle perched in profile) is one of the harder dates to find and is worth at least $50 badly worn and a few hundred if uncirculated.
A 1921 Half Dollar is 90% silver. It has a melt value of somewhere around $12. The related link below has more information.
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The Morgan dollar is named for its designer, George T. Morgan. They were minted from 1878 through 1904, then again for one year in 1921. As always, the value of a coin depends on its condition, its rarity, and sometimes its bullion value. The Morgan dollar contains .77344 oz of pure silver, and the value of silver changes from day to day. However, to a collector, the value of the silver content does not affect a coin's value as a collectors item. I looked online to see what 1921-S Morgans are selling for and they range from $50 in Fine condition to $60 in about Uncirculated.
For the Morgan dollars, 1921 was the last year of issue and the highest mintage. They were struck at all 3 Mints. Current retail value of a 1921-S is $30.00-$40.00 for circulated examples depending on the grade. Uncirculated are $45.00-$55.00 for most coins.