2005-S Minnesota State Quarter Value: Proof Coin Price Guide

The 2005-S Minnesota State Quarter is worth anywhere from $0.50 in typical proof condition to over $1,200 for rare specialized varieties. While most of these shiny “S” mint mark coins are common, certain “Extra Tree” errors and high-grade silver versions can be quite valuable to collectors today.

Coin Type / Grade	Estimated Value
Clad Proof (PR65-PR69)	$1.00 – $5.00
90% Silver Proof (PR69DCAM)	$15.00 – $30.00
Silver Proof (PR70DCAM)	$500.00+
Doubled Die “Extra Tree” (Errors)	$20.00 – $1,000.00+

History and Design of the 2005-S Minnesota State Quarter

The Minnesota State Quarter was the 32nd coin released in the United States Mint’s popular 50 State Quarters Program. Launched in 2005, the “Land of 10,000 Lakes” design features a beautiful landscape of a loon on a lake with two people fishing, surrounded by a lush forest of pine trees. This specific coin, bearing the “S” mint mark, was produced exclusively at the San Francisco Mint.

If you have found one of these in your change or a family collection, you might be wondering about its origins. Unlike the “P” and “D” quarters meant for daily spending, “S” quarters were mostly sold in specialized proof sets. To quickly determine if your find is a standard circulation strike or a high-value proof, using a top coin identifier app can save you hours of research.

The San Francisco Mint produced two distinct versions of the 2005-S Minnesota quarter: the copper-nickel clad version and the 90% silver version. Both feature a sharp, mirror-like finish known as “Proof.” While millions were made, the demand for these remains steady among hobbyists completing their statehood sets. CoinKnow users often report finding these in heirlooms rather than pocket change, as their shiny surface makes them stand out significantly.

Understanding the Two Types of 2005-S Quarters

It is crucial to distinguish between the two metal compositions of the 2005-S series. The standard “clad” version is made of the same copper-nickel alloy as your everyday quarters. However, the Mint also produced a 90% silver version for collectors. These silver coins are heavier and have a different edge color—they will appear bright white rather than showing a copper-colored “sandwich” line.

The value difference between these two is distinct. While a clad proof might only be worth a couple of dollars, the silver proof is tied to both numismatic rarity and the current spot price of silver. For those tracking current market trends, checking the latest 2005 quarter value data is the best way to ensure you aren’t selling a silver coin at clad prices.

Metal Composition	Weight	Mintage Quantity
Copper-Nickel Clad	5.67 grams	3,344,679
90% Silver	6.25 grams	1,678,649

The Famous 2005 Minnesota “Extra Tree” Doubled Die Errors

The 2005 Minnesota quarter is legendary in the coin world for having one of the most complex series of doubled die errors ever recorded. There are over 50 registered versions of the “Extra Tree” error. These occur when the die used to strike the coin has a slight misalignment, creating a “phantom” tree or a small bump that looks like an extra spruce tree in the forest on the reverse side.

While most of these errors are found on “P” and “D” mint mark coins, specialists look for them on “S” proofs as well. The most significant errors can fetch hundreds of dollars at auction. If you spot a strange artifact or “ghost tree” near the main forest on the right side of the coin, you might be holding a rarity. Many collectors use CoinKnow to zoom in on high-resolution images to verify these tiny details.

Looking at state quarter prices and mintage data shows that while California and other states are popular, the mechanical errors of the Minnesota design make it a favorite for “cherry-pickers” looking for hidden treasure.

Valuing the 2005-S Minnesota Silver Proof

The Silver Proof 2005-S Minnesota quarter is the “gold standard” of this specific release. Because they contain 0.1808 troy ounces of pure silver, they have an intrinsic bullion value. However, the real money is in the grading. Coins that receive a “Perfect 70” grade (PR70) from professional services like PCGS or NGC are extremely rare.

A PR70 Deep Cameo (DCAM) silver Minnesota quarter has a heavy contrast between the frosted design and the black, mirror-like fields. In recent auctions, these perfect specimens have sold for $500 to $900. If your coin has even a microscopic scratch or fingerprint, it will likely drop to a PR69 grade, which usually sells for about $15 to $25.

Condition / Grade	Silver Proof Value	Clad Proof Value
PR67 (Near Perfect)	$10.00	$2.00
PR69 (Common Choice)	$25.00	$8.00
PR70 (Perfect Specimen)	$1,150.00	$45.00

Tips for Identifying and Protecting Your 2005-S Quarters

Proof coins are very delicate. The “S” mint mark tells you it was made for collectors, and its value depends almost entirely on its surface quality. Even a single swipe of a cloth can leave “hairlines” that ruin the coin’s grade. If you find one outside of its original US Mint plastic case, you should handle it only by the edges.

To identify if yours is the silver version without a scale, look at the edge of the coin. If you see a solid silver color with no copper stripe, it’s 90% silver. If you see a brown or orange line, it’s the clad version. Many people use the CoinKnow app to log their finds and keep a digital inventory, which is helpful if you plan on selling your collection later.

Finally, keep an eye out for “Cameo” and “Deep Cameo” designations. These refer to the intensity of the frost on the design. A Deep Cameo coin will look like it has a white “snow” covering the loon and trees, contrasting sharply against the liquid-black background. These are the coins that command the highest premiums in the 2005 Minnesota set.

FAQ

Q: How can I tell if my 2005-S Minnesota quarter is silver?

A: The easiest way is to look at the edge (the “reeds”) of the coin. A silver coin will be solid silver-white, while a clad coin will show a distinct copper layer. Additionally, a silver proof weighs 6.25 grams, while a clad proof weighs 5.67 grams.

Q: Why is there an “S” on my Minnesota quarter?

A: The “S” stands for the San Francisco Mint. Unlike the “P” (Philadelphia) and “D” (Denver) quarters found in circulation, “S” quarters were strike specifically as Proof coins for collectors and sets.

Q: Are all “Extra Tree” errors worth money?

A: Most “Extra Tree” errors on 2005 Minnesota quarters are minor and might only be worth $5 to $10. However, the “Major” varieties, where the extra tree is clearly visible to the naked eye, can sell for $50 to $100 or more depending on the condition of the coin.

Q: Should I get my 2005-S Minnesota quarter graded?

A: You should only consider professional grading (PCGS or NGC) if you believe the coin is a “Perfect 70” or if it is a rare silver variety with a significant error. For common clad proofs, the cost of grading often exceeds the value of the coin.