The 2007-S Idaho State Quarter is worth anywhere from $5 in standard Proof condition to over $100 for high-grade Silver Proof specimens. While most quarters you find in your pocket change are only worth twenty-five cents, those bearing the “S” mint mark from San Francisco are special collector editions that can carry a significant premium.

Coin Version	Condition	Estimated Value
2007-S Idaho Clad Proof	PR 65 – PR 69	$4.00 – $7.00
2007-S Idaho Clad Proof	PR 70 Deep Cameo	$25.00 – $45.00
2007-S Idaho Silver Proof	PR 67 – PR 69	$12.00 – $18.00
2007-S Idaho Silver Proof	PR 70 Deep Cameo	$60.00 – $120.00

Understanding the 2007-S Idaho Proof Quarter Varieties

If you have discovered a 2007 Idaho quarter with a tiny “S” under the “In God We Trust” motto, you have found a Proof coin. Unlike the millions of quarters struck in Philadelphia or Denver for general circulation, the San Francisco Mint produced these specifically for collectors. To know exactly what you have, you should use the top coin identifier app to distinguish between the two main types: the copper-nickel “clad” version and the 90% silver version.

The clad version is made of the same materials as your everyday change but features a mirror-like finish. The silver version, however, is much more desirable. These were sold only in special “Silver Proof Sets.” Because they contain precious metal, their floor price is dictated by the current spot price of silver, though their numismatic (collector) value is usually much higher. If you are unsure which one you have, look at the edge of the coin. A copper stripe indicates a clad coin, while a solid silver-colored edge suggests the 90% silver variety. CoinKnow can help you log these finds and monitor how their market value changes over time.

Factors That Influence the 2007-S Idaho Quarter Value

The primary drivers of value for any 2007-S Idaho quarter are its material composition and its “Grade.” Professional grading services like PCGS or NGC use a 70-point scale. Since these coins were handled with care by the Mint, most are expected to be in “Gem Proof” (PR 65) condition or better. A single scratch or a fingerprint can drop the price significantly.

For many casual collectors, the Idaho and Montana state quarter market prices show a trend where “Deep Cameo” (DCAM) finishes command the highest prices. A Deep Cameo coin has a heavy frost on the design (the Peregrine Falcon and the state outline) that contrasts sharply against a mirror-like background. This visual “pop” is what high-end collectors crave.

Grading Tier	Luster & Appearance	Market Demand
PR 60-64	Light scratches, no frost	Low (Face value to $2)
PR 65-69	Attractive, mirror fields	Moderate ($5-$15)
PR 70	Flawless under magnification	High ($30-$100+)

Identifying 2007-S Idaho Silver vs. Clad Proofs

One of the most common questions from everyday Americans is: “How do I know if my 2007-S Idaho quarter is silver?” The San Francisco Mint struck 2,674,538 clad proofs and 1,313,481 silver proofs for the Idaho design. Because the silver version is rarer, it naturally carries a higher 2007 state quarter value guide price.

Beyond checking the edge of the coin, you can use a digital scale. A standard clad quarter weighs 5.67 grams. A 90% silver Idaho quarter is heavier, weighing in at 6.25 grams. If you find one in a plastic lens (the original Mint packaging), the label will usually state “Silver.” If it’s loose, checking the weight or using CoinKnow for visual confirmation is your best bet. Collectors often pay a significant premium for the silver variety because it combines the beauty of the “Esto Perpetua” design with intrinsic precious metal value.

Design Elements of the Idaho State Quarter

The 2007 Idaho quarter was the 43rd coin released in the 50 State Quarters® Program. It features the majestic Peregrine Falcon and an outline of the state. The motto “Esto Perpetua” (Let it be perpetual) is prominently displayed. When evaluating the value of your 2007-S, look for the crispness of the falcon’s feathers. In Proof versions, these details should be incredibly sharp.

If the falcon appears blurry or if the background has small “milk spots” (cloudy white patches often found on silver coins), the value may be slightly lower. However, even a spotted silver proof maintains its value based on the silver content. For those looking to sell, having a coin with “eye appeal”—no spots, no haze, and a deep contrast—is key to getting the top dollar listed in pricing guides.

Are There Any 2007-S Idaho Quarter Errors?

While the San Francisco Mint is known for high quality control, errors can still occur. However, “S” mint errors are much rarer than those found on Philadelphia or Denver coins. The most common “error” people look for is a “doubled die,” where the lettering or the falcon’s wing looks as if it was stamped twice.

If you think you’ve found an error, compare it to standard images in CoinKnow. Most “errors” found in pocket change are actually post-mint damage (scratches or chemical wear). True errors on a Proof coin, like a clipped planchet or an off-center strike, are exceptionally rare and can be worth hundreds, if not thousands, of dollars. Always have a professional verify an error before assuming it’s a jackpot.

Error Type	Description	Potential Value
Doubled Die	Doubling in the motto or date	$20 – $100
Die Haze/Tarnish	Cloudy surface on a proof	Reduces Value
Strike Thru	Debris caught during striking	$50+

How to Store and Sell Your 2007-S Idaho Quarter

If you’ve determined that your quarter is a valuable Silver Proof or a high-grade Clad specimen, you must protect it. Never clean your coins! Cleaning creates microscopic scratches that erase the “Proof” finish and destroy the collector value instantly. Instead, place the coin in a PVC-free plastic holder or a cardboard “2×2” flip.

When it comes time to sell, you have a few options. Local coin shops are convenient but may offer “buy prices” which are lower than retail. For the highest return, specialized online auctions or coin-collecting forums are better. You can use CoinKnow to track the current market trends so you know if an offer is fair or if you should hold onto your Idaho quarter as an investment.

FAQ

Q: Why does my 2007 Idaho quarter have an “S” instead of a “P” or “D”?

A: The “S” stands for the San Francisco Mint. Unlike the “P” (Philadelphia) and “D” (Denver) mints that make coins for everyday spending, the San Francisco Mint primarily produces “Proof” coins for collectors. These are usually sold in sets and are not intended for general circulation.

Q: Is every 2007-S Idaho quarter made of silver?

A: No. There are two versions. The “Clad” version is made of copper and nickel (it will have a copper stripe on the edge). The “Silver” version is 90% silver and 10% copper (it will have a solid silver-colored edge and weigh more).

Q: Can I find a 2007-S Idaho quarter in my change?

A: It is possible, but rare. This happens when someone breaks open a collector’s set and spends the coins. If you find one “in the wild,” it will likely be scratched or dull, which lowers its value to near face value ($0.25) for clad versions, though silver versions are always worth their weight in silver.

Q: What is the highest price ever paid for a 2007-S Idaho quarter?

A: Perfect PR 70 Deep Cameo Silver specimens have sold for over $150 at major auctions. Clad versions in the same perfect grade usually sell for between $30 and $50.

Q: How can I tell if my coin is “Deep Cameo”?

A: Look for a strong contrast between the “fields” (the flat, shiny background) and the “devices” (the raised parts like the falcon). If the falcon looks white and frosty while the background looks like a dark mirror, you likely have a Deep Cameo coin.