Coin Grading Basics: The Sheldon Scale Without the Jargon
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Short on time? The essentials
- The Sheldon scale is a 70-point ranking created by William Herbert Sheldon in 1949 and later adapted by the American Numismatic Association for all United States coins.
- Circulated grades run from Poor 1 (identifiable but worn nearly smooth) up through About Uncirculated 58 (a whisper of wear on the highest points). Mint State grades run from 60 to 70.
- Graders look at four things: wear on the high points, original mint luster, contact marks in prime focal areas, and overall eye appeal.
- The biggest price jumps on the ladder usually happen at About Uncirculated 58 to Mint State 63, then again at Mint State 65 (Gem) and Mint State 67 (Superb Gem).
- Third-party certification only pays off when the grade premium exceeds the grading fee plus shipping and insurance. Common circulated coins almost always fail that math.
- A slab is the sealed plastic holder used by the two most established grading services. It lists the coin, the date, the mint mark, the grade, and a unique certification number that anyone can verify online.
- Never clean a coin before submitting. Cleaning is the single most common reason a coin comes back as "Details" instead of a straight numeric grade.
- Good photographs, taken on a plain background with even light and no flash on the surface, let a knowledgeable numismatist give you a useful opinion before you spend anything on grading.
On this page
- What coin grading actually is
- Where the Sheldon scale came from
- What graders actually look at
- The grade ladder from Poor 1 to Mint State 70
- The key grade jumps that move price
- Slabbed-coin anatomy
- Raw versus certified: the decision math
- How to photograph a coin for an opinion
- What grading cannot tell you
- Coin grading FAQ
What coin grading actually is
Coin grading is the process of assigning a coin a number from 1 to 70 that summarizes its state of preservation. The number is not an opinion about beauty. It is a controlled reading of wear, surface preservation, strike sharpness, and mint luster.
Two coins of the same date and mint can carry very different market values because one grades Very Fine 20 and the other grades Mint State 65. The grade is often the single biggest lever on price, larger than the date on many series.
The scale in common use is the Sheldon scale, a 70-point ranking that later became the basis for the Official ANA Grading Standards. Modern third-party grading services all publish their own standards, and they all reference the same 70-point numeric ladder.
Where the Sheldon scale came from
Dr. William Herbert Sheldon introduced the 70-point scale in 1949 in his book Early American Cents, 1793 to 1814. The scale was originally designed for large cents, where subtle wear on the hair, cheek, and drapery of the portrait moved prices in a predictable way.
The American Numismatic Association adapted the scale for all United States coins during the 1970s. The result is the version collectors use today, with additions, deletions, and refinements from the original.
The scale is quirky by design. It skips numbers (there is no G-5 in normal use), and it groups grades under adjectives such as Fine, Very Fine, and About Uncirculated. That is not a bug; it reflects the market bands that actually price coins in the real world.
What graders actually look at
Every third-party grading service trains its graders to weigh the same four elements. When two graders disagree on a coin, they almost always disagree on how heavily to weigh one of these four, not on what the elements are.
Wear on the high points
Wear shows up first on the raised parts of the design: hair curls, cheekbones, eagle breast feathers, shield lines. A coin that circulated in commerce loses metal on those spots before anywhere else. On a Morgan dollar, the hair above the ear on Liberty is the classic first-wear zone.
Original mint luster
Mint luster is the cartwheel shine created when the coining press flows metal into the die. Real luster rotates as you tilt the coin under a light. It is destroyed by cleaning, and it fades with even light circulation. A coin with full original luster grades far higher than a coin of identical wear that has been polished or dipped.
Contact marks in prime focal areas
Contact marks are the small nicks a coin picks up bumping against neighbors in a mint bag or a coin roll. A mark on the cheek of Liberty on a silver dollar hurts the grade more than the same mark hidden in the hair. Graders track both the count and the location of these marks.
Overall eye appeal
Eye appeal is the catch-all label for whether the coin is attractive to look at. Toning can add to eye appeal (a rainbow-toned Morgan dollar in Mint State 65 often outsells a blast-white example of the same numeric grade) or subtract from it (a splotchy, unattractive tone drags the grade down). Two identical numeric grades can trade at different prices because of eye appeal alone.
The grade ladder from Poor 1 to Mint State 70
The table below is the shorthand every serious coin collector carries in their head. Grades are numeric, but each number sits under a familiar adjective. Learn the adjectives first and the numbers become natural.
| Grade code | Adjective | What you see |
|---|---|---|
| PO-1 | Poor | Barely identifiable. Date and design worn almost smooth. Only the outline and enough legend to name the coin remain. |
| FR-2 | Fair | Some detail visible. Heavy wear across the entire design. Rims often merge with the field. |
| AG-3 | About Good | Lettering is readable but the design is worn flat in many spots. Rims fade into the legends. |
| G-4, G-6 | Good | Full rims. Peripheral lettering complete. Central design faint but visible. |
| VG-8, VG-10 | Very Good | Two or three letters of LIBERTY show on coins that carry that word on the headband or shield. |
| F-12, F-15 | Fine | All lettering sharp. Some deeply recessed detail returns. Moderate but even wear across the surface. |
| VF-20 to VF-35 | Very Fine | All major features sharp. Light to moderate wear on the highest points. Some traces of mint luster at VF-35. |
| EF-40, EF-45 | Extremely Fine | Overall sharpness with only light wear on the very highest points. Mint luster appears in protected areas. |
| AU-50, AU-55, AU-58 | About Uncirculated | A trace of wear on the highest points. Half to nearly all of the original mint luster remains. |
| MS-60 to MS-62 | Uncirculated | No wear, but dull luster and heavy contact marks. Often unattractive to look at despite the technical Mint State grade. |
| MS-63 | Select or Choice Uncirculated | Average luster with a few noticeable marks. First tier most collectors find genuinely attractive. |
| MS-64 | Choice Uncirculated | Good luster and eye appeal with several small marks or a couple of larger ones. |
| MS-65, MS-66 | Gem Uncirculated | Strong luster, few marks, above-average eye appeal. The first tier a serious collector will actively chase. |
| MS-67 to MS-69 | Superb Gem Uncirculated | Full booming luster, minimal marks, exceptional eye appeal. Genuine condition rarity for most series. |
| MS-70 | Perfect Uncirculated | No visible flaws at 5x magnification. Common on modern bullion coins, essentially unknown on classic pre-1933 issues. |
Sources: Sheldon coin grading scale (Wikipedia) drawing on the Official ANA Grading Standards; Q. David Bowers, Grading Coins by Photographs (2012). Checked August 2026.
The key grade jumps that move price
Every grade line on the ladder above is a real transition, but four of them account for most of the price movement on a typical collector coin. Knowing where those jumps live is the difference between a fair offer and a bad one.
The jump from About Uncirculated 58 to Mint State 63
AU-58 is a coin with a whisper of wear that retains almost all of its original luster. MS-63 is an unworn coin with modest bag marks. On many series the visual difference is subtle, but the price difference can be several multiples of the AU-58 level.
This is the ladder rung where inexperienced sellers lose the most money. A raw coin sold as "brilliant uncirculated" that later grades AU-58 can bring a fraction of what the seller expected.
The jump from Mint State 64 to Mint State 65
MS-65 is the entry level for Gem Uncirculated. Serious type collectors buy MS-65 as their base and settle for MS-64 only when the higher grade is unaffordable. The one-point move often doubles or triples the price on common-date material.
The jump from Mint State 66 to Mint State 67
Above MS-66, coins become genuinely scarce for most classic series. Population reports from the major grading services show the top tiers thinning fast, and pricing follows the scarcity. A single point of grade can multiply the price by a large factor.
The jump from Mint State 69 to Mint State 70
On modern coins struck for collectors, MS-70 (perfect) is common enough to trade at a modest premium over MS-69. On classic pre-1933 material, MS-70 is practically nonexistent, so the jump does not really exist for those series.
Slabbed-coin anatomy
A slab is the tamper-evident plastic holder a third-party grading service seals a coin inside after grading. The two largest and most established slabbing services in the United States are the Professional Coin Grading Service (PCGS) and Numismatic Guaranty Company (NGC). A third, ANACS, was the American Numismatic Association's own grading arm before it was sold and is still active. All three publish their standards and maintain public verification databases.
Every slab prints five pieces of information on its label:
- The coin description: series name, denomination, mint mark, and often the variety attribution (VAM number, FS number, or die pair).
- The date and mint: for example, 1881-S Morgan Dollar or 1916-D Mercury Dime.
- The Sheldon grade: a number from 1 to 70, sometimes with a "+" or a star qualifier for eye appeal at the top of the grade.
- The certification number: a unique identifier that lets anyone look the coin up in the grading service's online population and verification database.
- The barcode: which encodes the certification number for machine reading and links back to the same online record.
A "Details" grade is a slab label that names a problem instead of a number. Common Details labels include Cleaned, Environmental Damage, Scratched, Tooled, or Genuine Authenticity Unverified. A Details coin still trades in the market, but at a large discount to a straight-graded example of the same wear level.
Raw versus certified: the decision math
Every coin owner eventually faces the same question. Should this coin be sent in for third-party grading, or sold raw? The answer is a simple piece of arithmetic once you know the three variables.
The three variables are the coin's likely raw sale price, the coin's likely certified sale price at the expected grade, and the total cost of grading (fee plus shipping in, shipping out, insurance both ways, and the wait time). Certified sale price minus raw sale price minus total cost is your profit or your loss.
How to photograph a coin for an opinion
Before spending on grading, the smart first step is to get a knowledgeable second opinion on a photograph. A good photograph lets an experienced collector or a reputable dealer offer a rough grade estimate at zero cost. A bad photograph guarantees no useful opinion.
- Use a plain, neutral background. A sheet of medium-gray paper works better than white or black. Gray forces the camera's exposure to render the coin's actual metal color rather than blowing out the surface or crushing the shadows.
- Set two soft light sources at roughly 10 and 2 o'clock. Even, diffused light from two angles reveals both the field texture and the design detail. Direct flash on a coin creates a hot spot that hides everything under it.
- Fill the frame with the coin. Get as close as your camera focuses, then use a light crop to remove the background. A coin that fills less than half the frame gives the viewer nothing to grade.
- Take one square-on obverse shot and one square-on reverse shot. Then add one angled shot per side to reveal luster and any hairlines. Four shots per coin is the minimum for a useful opinion.
- Shoot on a tripod or a stable surface. Any hand movement blurs the fine detail that a grader needs to see. A ten dollar phone tripod pays for itself the first time.
- Never edit color, brightness, or sharpness beyond a light exposure correction. Grade estimators need to see the coin as it actually looks. Filtered or heavily edited photos are useless and are treated with suspicion by any serious buyer.
What grading cannot tell you
A grade is a powerful piece of data, but it does not answer every question. The list below is what a Sheldon grade cannot do, and where new owners most often get their expectations wrong.
A grade does not tell you what the coin is worth on any given day. Market prices for the same certified grade move with the overall market, with the popularity of the series, and with how many other examples of the same date and grade came to market that month. A grade is a permanent label; a price is a moving number.
A grade does not certify a coin as rare. Millions of common coins have been graded, and a Mint State 65 on a common date is still a common coin. The certification proves authenticity and condition, not scarcity.
A grade does not create investment value where the underlying coin has none. A common circulated coin in a slab is still a common circulated coin. Slabs cost money, and grading a coin does not add value beyond what the certified market already pays.
A grade cannot rescue a cleaned coin. A dipped, polished, or scrubbed coin will grade as Details at best, and the value will sit at a fraction of a straight-graded example. If you inherited coins, do nothing to their surfaces before an expert looks at them.
A grade does not settle every buyer disagreement. Two collectors can look at the same MS-64 coin and one will love the eye appeal while the other will find it dull. The number is a floor for the conversation, not the whole conversation.
A grade does not make grading the right move for every coin. On low-value material, the grading fee will eat most of the sale price. On high-value material, grading is often required to sell at fair value. Run the decision math above before submitting anything.
Coin grading FAQ
What does MS mean on a coin?
MS stands for Mint State, meaning the coin never circulated as money. Mint State grades run from MS-60 (unworn but ugly, with heavy bag marks) up to MS-70 (visually perfect at low magnification). A coin has to show absolutely no wear on the high points to earn any Mint State grade.
Is the Sheldon scale the same at every grading service?
The 70-point numeric ladder is the same. The individual standards each service uses to place a coin on that ladder differ in small ways, and the same coin can grade one point higher or lower at different services. The Official ANA Grading Standards is the closest thing to a shared reference.
What is the difference between a numeric grade and a Details grade?
A numeric grade (for example, VF-25 or MS-64) means the coin has no disqualifying problem and sits on the standard Sheldon ladder. A Details grade names a problem such as Cleaned, Scratched, or Environmental Damage instead of assigning a number. Details coins trade at a large discount to straight-graded coins of similar wear.
Should I clean a dirty coin before selling it?
No. Cleaning a coin is the fastest way to lower its value. Any polishing, dipping, wiping, or rubbing removes original surface and mint luster that a grader will look for. A crusty, original coin almost always outsells the same coin after amateur cleaning.
How long does third-party grading take?
Turnaround depends on the service tier you pay for. Bulk economy tiers can run several months. Standard tiers commonly turn around in weeks. Same-day and walk-through tiers at major coin shows return grades in hours, at a much higher fee per coin. Check the grading service's own turnaround page before submitting.
What is the difference between PCGS, NGC, and ANACS?
All three are third-party grading services that authenticate a coin, assign a Sheldon grade, and seal the coin in a labeled plastic holder. PCGS and NGC are the two largest by graded volume and by market recognition. ANACS was the American Numismatic Association's original grading arm and is still an active service.
Does slabbing a coin guarantee I can sell it at the listed price?
No. A certified grade sets a market band, but the sale price depends on the buyer, the venue, and market conditions on the day of sale. The same MS-65 coin can sell at retail on a major auction site, at a dealer buy price at a coin shop, or below both at a forced-sale liquidation.
Are grading fees worth it for an inherited coin collection?
Sometimes. Run the decision math for each meaningful coin before submitting the whole box. On common circulated material, the grading fee will exceed the coin's value. On uncirculated coins of scarce dates or on any coin that could be a mint error, a certification usually pays for itself many times over at sale.
Sources
- Wikipedia, Sheldon coin grading scale. Origin (William Herbert Sheldon, Early American Cents 1793 to 1814, 1949), ANA adaptation in the 1970s, full grade-by-grade descriptions for circulated grades (Poor 1 through About Uncirculated 58) and Mint State grades (MS-60 through MS-70), and adjectival grade equivalents (Uncirculated, Choice, Gem, Superb Gem, Perfect). en.wikipedia.org/wiki/Sheldon_coin_grading_scale. Checked August 2026.
- Wikipedia, Coin grading. Background on the four grading elements (wear, luster, marks, eye appeal), the role of third-party grading services, and the difference between numeric and Details grades. en.wikipedia.org/wiki/Coin_grading. Checked August 2026.
- American Numismatic Association (ANA). Official ANA Grading Standards for United States Coins. The reference standard on which the modern Sheldon scale is built and against which most third-party grading services benchmark. money.org. Checked August 2026.
- Professional Coin Grading Service (PCGS). PCGS Grading Standards and PCGS Certification Verification. Publisher's own grade definitions, population reports, and the online tool that verifies a certification number against the label. pcgs.com/grades. Checked August 2026.
- Numismatic Guaranty Company (NGC). NGC Coin Grading Scale and NGC Verify NGC Certification. Publisher's own grade descriptions and the online verification tool for the certification number and label. ngccoin.com/coin-grading/grading-scale. Checked August 2026.
- Q. David Bowers, Grading Coins by Photographs, 2nd edition, 2012. The standard modern reference on side-by-side grading with high-resolution images. Bowers writes that grading is interpretive rather than an exact science and that the same coin can legitimately be viewed at one grade by one expert and one point higher or lower by another. shop.pcgs.com/product/grading-coins-by-photographs. Checked August 2026.
- United States Mint. Coin Specifications and Historical Composition. Reference for the standard weights, diameters, and compositions used in mint set and error identification. usmint.gov/learn/history-and-artistry. Checked August 2026.