Trading Card Glossary › Grading & Authentication
PSA 10
Also known as: Gem Mint, PSA Gem Mint
A PSA 10 Gem Mint is the highest grade awarded by Professional Sports Authenticator. To achieve this coveted rating, a card must have four perfectly sharp corners, near-perfect centering (55/45 or better front-to-back, 60/40 or better side-to-side), a surface completely free of scratches, print defects, and stains, and edges that are flawless to the naked eye.
PSA 10s command a dramatic premium over lower grades — often 5–10× the value of a PSA 9 for popular cards. Only a small percentage of submitted cards receive this grade, making it the benchmark for collectors and investors alike.
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