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The 2017-S Effigy Mounds Quarter is worth anywhere from $0.25 in circulated condition to over $500 in top-tier PF 70 Ultra Cameo grades. While most “S” mint quarters are found in special sets, finding a high-quality specimen in your change is a thrilling discovery for any casual collector.
| Condition Grade | Estimated Value (USD) |
|---|---|
| Circulated (Average Wear) | $0.25 – $0.50 |
| Uncirculated (MS 63-65) | $2.00 – $10.00 |
| Proof (PR 67-69) | $12.00 – $35.00 |
| Silver Proof (PR 70) | $150.00+ |
History and Significance of the 2017-S Effigy Mounds Quarter
The 2017 Effigy Mounds National Monument quarter is the 36th release in the US Mint’s “America the Beautiful” series. This particular design honors the sacred prehistoric earthworks found in Iowa, featuring an aerial view of the iconic bear and bird-shaped mounds. For the everyday American, the “S” mint mark is what makes this coin stand out. While Philadelphia (P) and Denver (D) coins were minted by the billions for general circulation, the San Francisco (S) mint primarily produced these for collectors.
If you aren’t sure which version you have, using a top coin identifier app can help you distinguish between the standard business strikes and the specialized proof strikes. Collectors often use CoinKnow to quickly scan their pocket change for these rare “S” marks. Because the 2017-S was not originally intended for mass circulation, finding one in your local grocery store change is quite rare.
Most “S” mint quarters from this era were sold in Mint Sets or Proof Sets. However, “Uncirculated S-Mint” business strikes were also sold in bags and rolls directly to the public. This created a unique niche where some coins entered the wild, while others stayed pristine in plastic cases. Understanding the 2017 quarter value depends heavily on which specific San Francisco minting you hold in your hand.
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Determining the 2017-S Quarter Value by Variety
There are three distinct types of 2017-S quarters that you need to be aware of. The first is the “Circulating Clad” S-mint. These use the same copper-nickel composition as standard quarters. The second is the Clad Proof, which has a mirror-like finish. The third, and most valuable to high-end collectors, is the 90% Silver Proof.
Because the silver version contains actual precious metal, its floor price is naturally higher than its face value. Professional collectors use CoinKnow to track daily silver spot prices alongside coin grades to ensure they aren’t underselling. If you are looking for specific Effigy Mounds quarter price data, it is vital to check the edge of the coin. A copper stripe indicates a clad coin, while a solid silver edge indicates the more valuable 90% silver variety.
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| Coin Variety | Mintage (Approx) | Typical Value Range |
|---|---|---|
| 2017-S Clad Business Strike | 915,000 | $1.50 – $25.00 |
| 2017-S Clad Proof | 880,000 | $5.00 – $45.00 |
| 2017-S 90% Silver Proof | 570,000 | $30.00 – $180.00 |
Identifying 2017-S Effigy Mounds Error Quarters
Errors can turn a common quarter into a windfall. For the Effigy Mounds design, collectors look for specific strikes and planchet issues. One common phenomenon discussed in the CoinKnow community is the “Doubled Die” error. This occurs when the hub strikes the die slightly out of alignment, creating a doubled appearance on the lettering or the mounds themselves.
Other errors to watch for include “Die Chips.” On the Effigy Mounds quarter, some collectors have reported small bumps of extra metal on the animals, often nicknamed “leaking” or “extra mound” errors. While these are not official US Mint varieties, they can command a premium from niche error collectors.
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Always inspect the rim and the fields (the flat surfaces) of the coin. If you see something that looks “wrong,” don’t clean it! Cleaning a coin destroys its numismatic value. A raw error coin with original luster is always worth more than a polished one. Use a magnifying glass or a high-resolution camera to document what you find before showing it to a dealer.
The Role of Grading in Your Quarter’s Worth
Grading is the process of determining a coin’s physical condition on a scale of 1 to 70. For the 2017-S Effigy Mounds Quarter, the difference between a grade of 68 and 70 can be hundreds of dollars. A grade of 70 represents a “perfect” coin with no visible scratches or marks even under 5x magnification.
Since most “S” mint coins were handled with more care than Philadelphia or Denver coins, many exist in high grades. However, because the Effigy Mounds design has many wide, flat areas (the “mounds”), it is very prone to “bag marks”—tiny scuffs caused by coins hitting each other in a bag.
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If you have a coin that looks flawless, it might be worth sending to a professional grading service like PCGS or NGC. A certified “MS 67” (Mint State 67) 2017-S quarter is a prize for any collector. Without professional certification, most buyers will only pay “raw” prices, which are significantly lower than “slabbed” prices.
| Condition | Clad Value | Silver Value |
|---|---|---|
| Mint State 63 | $2.50 | $28.00 |
| Mint State 65 | $8.00 | $45.00 |
| Mint State 67 | $25.00 | $85.00 |
| Gem Proof 70 | $65.00 | $450.00+ |
Why the San Francisco Mint Mark Matters
The “S” mint mark is historically reserved for limited-run coins. In 2017, the San Francisco mint produced these quarters for two main reasons: Proof Sets and “Uncirculated S-Mint” rolls sold directly to collectors. Unlike the 2017-P or 2017-D quarters, which you will find in almost every handful of change, the 2017-S was never intended to be spent at a store.
When an “S” mint quarter is found in circulation, it’s usually because a collector’s set was broken open or someone spent a roll of coins they inherited without knowing the value. This creates a supply-and-demand imbalance. There are far fewer 2017-S Effigy Mounds quarters than there are collectors who want to complete their “America the Beautiful” sets.
Even in high-grade “circulated” condition (meaning it was spent but still looks shiny), the coin is worth at least 4 to 10 times its face value. This makes it a “key” coin for casual hunters. Checking your change for that tiny “S” next to George Washington’s ponytail is one of the easiest ways to start a valuable coin collection without spending a dime.
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Should You Sell or Hold Your Effigy Mounds Quarter?
The market for modern quarters can be volatile. Right now, there is high interest in the “America the Beautiful” series because the series has recently concluded. As new collectors enter the hobby, they often look back at 2017 as a year with interesting designs.
If you have a 90% silver proof version in a perfect PF 70 grade, holding it long-term might be a smart move, as the population of “perfect” coins is fixed. However, for a standard clad “S” mint coin you found in your pocket, selling it now for $5 to $10 is a great return on a 25-cent investment.
Before selling, always check recent “Sold” listings on auction sites rather than “Asking” prices. This gives you a realistic view of what people are actually paying. Many collectors use CoinKnow to track these realized auction prices in real-time. Whether you decide to keep it as a piece of history or sell it for a profit, the 2017-S Effigy Mounds quarter remains one of the most interesting “modern finds” in US coinage.
FAQ
Q: Is every 2017 quarter with birds on it rare?
A: No, only those with the “S” mint mark are considered rare. Quarters with “P” or “D” mint marks were minted in the hundreds of millions and are generally only worth face value ($0.25).
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Q: How can I tell if my 2017-S Effigy Mounds quarter is silver?
A: Check the edge of the coin. If you see a solid silver-colored edge with no copper stripe, it is likely the 90% silver proof. You can also weigh it; silver quarters weigh 6.25 grams, while clad quarters weigh 5.67 grams.
Q: Why does the 2017-S have such a high value in high grades?
A: In “MS 70” or “PF 70” condition, the coin is considered flawless. Because very few coins survive the minting and packaging process without a single microscopic scratch, collectors pay a massive premium for these “perfect” specimens.
Q: Can I find a 2017-S in my pocket change?
A: Yes, but it is rare. They were sold in bags and rolls to collectors, and some of those rolls were eventually opened and spent. It is always worth checking your change for the “S” mint mark!