Card grading glossary

Gem Mint

The top grade tier (PSA/CGC 10, BGS Pristine or Black Label), reserved for a card with essentially no visible flaws on any of the four axes. Corners are sharp, edges are clean, the surface is flawless, and centering sits inside the tightest published tolerance.

How grading works

Subgrades

The four independent scores that make up a card's overall grade: corners, edges, surface, and centering. BGS and CGC publish all four alongside the overall number, PSA publishes the overall only.

The four subgrades

Corners

The subgrade for the card's four corners, checked for whitening, fraying, and softness where the tip has begun to round. A single soft corner is the single most common reason a card misses Gem Mint.

Edges

The subgrade for the card's outer border along all four sides. Edges chip and nick differently than corners, damage runs along a straight line rather than a single point, and is graded independently.

Surface

The subgrade for the front and back face of the card between the borders: scratches, print lines, indentations, staining, and the factory sheen on foil and holo cards. Surface is the most subjective of the four axes because it is read visually rather than measured.

Centering

The subgrade for how evenly the printed image sits inside the card's border, measured as a left/right and top/bottom ratio. Centering is the one subgrade that is fully measurable rather than a judgment call, and is usually the hardest ceiling to clear for a true Gem Mint.

Overall grade

The single number a grading company puts on the slab, computed from the four subgrades. It is anchored to the worst axis rather than averaged, so one damaged corner still caps the card close to that corner's score.

How the overall is calculated

Half grade

A grade that falls between two whole numbers, e.g. 8.5 or 9.5. BGS and CGC grade in half-point increments across all four subgrades and the overall; PSA's overall is whole numbers only.

Qualifier

A letter suffix PSA adds to a grade to flag a specific issue that isn't fully reflected in the number, most often OC (off-center) or MC (miscut). A qualified grade usually sells for less than an unqualified card at the same number.

Silvering

A manufacturing flaw where the printed color layer doesn't fully reach the card's cut edge, exposing the white cardstock core as a thin silver or white line. It's most visible on dark-bordered cards and is common on WOTC-era Pokemon.

Full silvering guide

Whitening

Exposed white cardstock at a corner or edge from wear rather than the factory, the handling equivalent of silvering. It accumulates from sleeve insertion and general handling and, once present, is permanent.

Fish-eye

A small circular or oval mark on a card's coating where the print surface didn't adhere evenly, named for its lens-like shape. It's a factory defect on the surface axis and can appear on an otherwise pack-fresh card.

Print line

A thin straight line in the printed ink layer left by the printing press, usually running the full width or height of the card. Print lines are a surface-axis defect and are graded the same whether they're barely visible or bold.

Holo bleed

A registration flaw on foil or holographic cards where the holographic pattern extends past the printed image's edge, or the color layer misaligns with the foil layer. It reads as a surface or print-quality issue depending on severity.

Toning

A gradual color shift in a card's surface or border, usually a yellowing or browning, caused by age, light exposure, or the materials in old penny sleeves and pages. Common on vintage cards and graded as a surface defect.

Staining

A discolored mark on the card surface from moisture, adhesive, or contact with another material, distinct from print-related marks because it sits on top of the printed layer rather than in it.

Indentation

A dent or depression in the card's surface from pressure, without necessarily breaking the print layer. Indentations catch the light differently than scratches and are graded on the surface axis.

Crease

A bend that breaks the card's surface, ranging from a hairline crease barely visible at an angle to a full crease that visibly cracks the print layer. Any confirmed crease is one of the more severe surface defects and typically caps a card well below Gem Mint.

Print defect

Any factory-origin flaw baked into the card at printing, as opposed to damage from handling. Silvering, print lines, fish-eye, and holo bleed are all print defects; whitening from wear and creases from bending are not.

Corner fraying

Small fiber strands lifting or separating at a corner tip, usually the earliest visible sign of corner wear before whitening sets in. Fraying is checked under magnification and pulls down the corner subgrade even when it's not visible to the naked eye.

Slab

The sealed hard plastic case a grading company ships a card in after grading, stamped with the certification number, grade, and card identity. "Slabbed" means graded and encased; the term is used interchangeably with the graded card itself.

Raw

A card that hasn't been graded and encased, sold and evaluated on visual condition alone rather than a certified number. Most cards start raw; only a fraction get submitted for grading.

Slab-or-sell ROI calculator

Crossover

Submitting a card already slabbed by one company (e.g. CGC) to a different company (e.g. PSA) to be re-graded and re-slabbed, usually to chase a higher resale price under the more recognized label. The new grade can come back higher, lower, or the same.

Full crossover guide

Reholder

Sending an already-graded card back to the same company to replace a cracked, scratched, or outdated case without changing the grade. Cheaper and faster than a full re-grade since the card isn't re-evaluated.

Pop report

Short for population report: a grading company's public count of how many copies of a specific card have received each grade. A low pop count at the top grade signals scarcity and often drives a price premium.

How to read a PSA pop report · ZeroPop's community pop report

Authentication only

A grading service tier (often called AA) that verifies a card is genuine and encases it without assigning a numeric grade. Cheaper than full grading, used for cards where authenticity matters more than a condition number, such as autographs.

Chase card

The rarest, highest-value pull in a given set or product, the card collectors specifically target when buying packs or boxes. Chase cards carry the widest gap between raw and graded price, which usually makes them the best submission candidates.

First Edition

A print-run marker on early Pokemon cards (a small stamp on the left side) indicating the card came from the first production run of a set, before the wider unlimited print run. First Edition copies command a significant premium over unlimited copies of the same card.

Reverse holo

A card variant where the holographic foil covers the card's border and background instead of the main illustration, the reverse of a standard holo pattern. Reverse holos are usually more common than the equivalent full holo but still carry a premium over the base non-holo print.

PSA

Professional Sports Authenticator, the largest and most recognized card grading company by resale value. PSA publishes a single overall grade with no public subgrades and grades in whole numbers, topping out at PSA 10 Gem Mint.

BGS

Beckett Grading Services, known for publishing all four subgrades alongside the overall grade and grading in half-point increments. A BGS 10 with four perfect 10 subgrades is called a Black Label.

CGC

Certified Guaranty Company, a newer entrant to card grading (building on its long history in comics) known for faster turnaround and a growing secondary market, with subgrades published like BGS.

SGC

Sportscard Guaranty Corporation, a grading company known for a distinctive black-bordered slab and strong vintage-market recognition, particularly for pre-war and older sports cards.