What is coin grading?
The Grading Scale
Coin grading uses a 70-point scale, with 70 being perfect. The scale ranges from Poor (P-1) to Mint State (MS-60 to MS-70) for uncirculated coins. Circulated grades include Good (G-4), Very Good (VG-8), Fine (F-12), Very Fine (VF-20), Extremely Fine (EF-40), and About Uncirculated (AU-50 to AU-58).
Proof coins are graded similarly, with PF-60 to PF-70. The grade reflects surface preservation, strike quality, luster, and eye appeal. A coin graded MS-65 is choice uncirculated, while MS-70 is flawless. Third-party grading services like PCGS and NGC encapsulate coins with a grade and certification number.
- P-1 to FR-2: Poor to Fair
- AG-3 to G-4: About Good to Good
- VG-8 to F-12: Very Good to Fine
- VF-20 to EF-40: Very Fine to Extremely Fine
- AU-50 to AU-58: About Uncirculated
- MS-60 to MS-70: Mint State
Why Grading Matters
Grading provides a universal language for collectors and dealers. It helps buyers and sellers agree on condition and value. A coin's grade can dramatically affect its price; for example, an 1881-S Morgan dollar in MS-65 might sell for $150, while an MS-67 could bring $500 or more.
Grading also authenticates coins and detects counterfeits or alterations. Professional grading is recommended for valuable coins. However, grading can be subjective, especially for circulated coins, so it's often said 'buy the coin, not the holder.'
Common mistakes
- Assuming all grading services are equal; stick with reputable ones like PCGS and NGC.
- Overgrading your own coins; it's common to be optimistic.
- Believing a high grade guarantees a high value; rarity and demand also matter.
