Hello! That's a great question, as the value of a 1921 silver dollar can vary quite a bit. The most important thing to know is that there are actually two different types of silver dollars from that year: the Morgan Dollar and the Peace Dollar, and they have very different values.
The 1921 Morgan Dollar is the more common of the two. For a coin that has been in circulation and shows some wear, you can generally expect it to be worth between $25 and $50, depending on its specific condition. If the coin is in uncirculated, like-new condition, its value can start around $60 and increase from there. Mint marks from Denver (D) or San Francisco (S) don't drastically change the value for these common coins.
The 1921 Peace Dollar, on the other hand, is a completely different story. This was the very first year the Peace Dollar was minted, making it a key date for collectors and much rarer. Even in circulated condition with noticeable wear, a 1921 Peace Dollar is typically worth between $100 and $300. For an uncirculated one, the value jumps significantly, often starting over $500 and potentially reaching into the thousands of dollars for a pristine example.
So, the first step is to figure out which coin you have! The Morgan dollar features a classic portrait of Lady Liberty, while the Peace dollar has a different profile of Liberty with a radiate crown. Besides the type, the coin's specific condition, or grade, is the other major factor in its final price. For a precise valuation, consulting a reputable coin dealer is always a great idea.
