Rare 2006 Quarter Errors Worth Money (Full List With Pictures)

A 2006-D Nebraska state quarter with an air bubble lamination error sold for $1,320 on eBay in 2023 — not bad for a coin worth two bits on a good day. This 2006 quarter errors list covers every documented minting mistake from the five state quarter designs released that year (Nevada, Nebraska, Colorado, North Dakota, and South Dakota), with confirmed sales ranging from $540 to $1,320. Here’s what each error looks like and what it’s actually worth.

1. 2006 Quarter Rim Cud Error (Up to $540)

A rim cud forms when a chunk of the die’s edge breaks away completely. Metal flows into the void during subsequent strikes, building a raised, shapeless blob along the coin’s rim where normal features should be.

The 2006-P South Dakota quarter produced the highest-priced cud for this year. South Dakota’s reverse — Mount Rushmore with a pheasant overhead — has tight, detailed design elements near the rim, so even a modest cud obliterates recognizable features. Colorado quarters from the same year also show documented cuds along the Rocky Mountain design border. Larger cuds that cover part of a state inscription or Washington’s portrait on the obverse draw the strongest collector interest. Small edge chips that barely extend into the field are routine on worn dies and don’t move the needle.

Value: A 2006-P South Dakota quarter graded MS64 with a large rim cud sold for $540 at Heritage Auctions in 2022. Small cuds under 3mm add $10 to $50. Medium cuds reaching 5mm bring $100 to $300 in uncirculated condition. Location matters — cuds near state names, dates, or Washington’s portrait command higher premiums than those sitting in empty field areas.

How to Identify: Scan the rim on both sides for a raised, shapeless blob extending from the edge into the coin’s field. The cud sits where a normal rim section or design element should be.

Under magnification, the cud surface should show mint luster and smooth, rounded contour. Post-mint rim dings produce sharp, angular dents — not raised blobs with factory finish.

Measure the cud. Anything over 5mm is worth investigating. Cuds always connect to the rim — a raised lump floating in the field is a die chip, which is a different and cheaper variety.

Check the reeded edge near the cud. On genuine cuds, the reeding is absent or distorted where the die broke away. Normal reeding all the way around suggests post-mint damage.

Fastest check: raised blob at the rim with smooth contour, mint luster, and disrupted reeding at the break point.

Use Our 2006 Quarter Value Checker

 

2. 2006 Quarter Struck Through Error (Up to $735)

Struck through errors occur when foreign material — debris, grease, cloth, or metal fragments — lands between the die and planchet at the moment of striking. The object blocks or displaces part of the design, leaving its impression on the finished coin.

The 2006-P South Dakota quarter that set the price record had debris physically struck into the obverse — a retained struck through, which is the most valuable subtype because the foreign object is still present. Grease-filled die errors are the most common version, showing smooth blank patches where design details should be, but they bring far less. The South Dakota reverse design has fine detail work in the Mount Rushmore carving and pheasant feathers, making missing or distorted detail easier to spot than on simpler designs.

Value: A 2006-P South Dakota quarter graded MS62 with an obverse debris struck through sold for $735 at Heritage Auctions in 2022. Non-retained strike throughs in uncirculated condition sell for $25 to $150. Retained examples with identifiable embedded objects reach $200 to $600. Grease fills trade at the lower end.

How to Identify: Look for unusual depressions, weak areas, or missing design details that don’t match normal wear. Grease fills show smooth blank patches. Debris strikes leave irregular depressions or embedded fragments.

Use 10x magnification and strong angled light. The affected area should show consistent depth and clean edges — not the rough, irregular texture of a post-mint scratch or gouge.

For retained strike throughs, look for foreign material embedded flush with the coin’s surface, sitting within the design rather than piled on top.

Weigh the coin — standard 5.670 grams. Strike throughs don’t affect weight.

Fastest check: a clean depression or embedded object surrounded by undisturbed mint luster.

Use Our 2006 Quarter Value Checker

 

3. 2006 Quarter Die Break Error (Up to $750)

Die breaks occur when a coin die develops stress fractures from repeated use at high pressure. Metal fills these fractures during striking, and the accumulated material transfers as raised lines or blobs onto every planchet the damaged die hits.

The 2006-D Washington quarter that sold for $750 had die break errors on both the obverse and reverse — dual-sided breaks visible without magnification. That double-sided feature is what pushed the price well above typical single-face die crack territory. On the 2006 state quarter reverses, die breaks often run through the detailed state designs — across Colorado’s Rocky Mountains, through Nebraska’s Chimney Rock, or across Mount Rushmore on the South Dakota version. The more design detail a crack disrupts, the more visually dramatic the result.

Value: A 2006-D Washington quarter graded MS65 with obverse and reverse die break errors sold for $750 at Heritage Auctions in 2022. Single-face die cracks add $10 to $100. Large cracks spanning the full field or running through major design elements reach $150 to $400. Dual-sided breaks bring the highest premiums.

How to Identify: Rotate the coin under bright, angled light. Die breaks appear as thin raised lines running across the surface — straight, curved, or branching.

Run your fingernail across the line. Genuine die breaks are raised. You should feel a bump. Post-mint scratches sit below the surface.

Under 10x magnification, the raised metal should show the same luster and texture as the surrounding coin. Rough or discolored lines suggest damage.

Check both sides. Dual-sided breaks are less common and more valuable.

Fastest check: a raised line with mint luster that you can feel with your fingernail on both obverse and reverse.

Use Our 2006 Quarter Value Checker

 

4. 2006 Quarter Missing Clad Layer Error (Up to $870)

State quarters use a copper-nickel outer layer bonded to a pure copper core. A missing clad error happens when this outer layer fails to adhere on one or both sides, exposing the reddish-copper core underneath.

The color contrast on a quarter is dramatic. Instead of familiar silver-gray, the affected face shows copper-penny color visible from across the table. The 2006-D Colorado quarter that sold for $870 had a partial missing clad layer — one full side showing copper. Colorado’s Rocky Mountain reverse design in copper rather than silver-gray creates a visually striking result that’s unlike any normal coin. Bonding failure happens during planchet manufacturing when contaminants weaken the adhesion between layers.

Value: A 2006-D Colorado quarter graded MS64 with a partial missing clad error sold for $870 at Heritage Auctions in 2023. Single-side full missing clad trades for $200 to $700 depending on grade. Both sides missing cladding commands $500 to $870 and above. Partial loss — small patches rather than full-face exposure — goes for $50 to $200.

How to Identify: The color is the giveaway. One or both sides appear copper-red instead of silver-gray.

Weigh the coin on a precision scale. Standard weight is 5.670 grams. A missing clad layer drops weight to roughly 4.70–5.00 grams depending on how much alloy is absent. This weight test is the most reliable diagnostic.

Under magnification, the exposed copper surface should be smooth with sharp, fully formed design details. If the surface looks rough, pitted, or chemically etched, someone stripped the cladding after minting.

Check the edge cross-section. On genuine examples, the copper-nickel alloy layer is visibly absent on the affected side of the clad sandwich.

Fastest check: weigh it — significantly under 5.670 grams with a copper-colored face settles the question.

Use Our 2006 Quarter Value Checker

 

5. 2006 Quarter Off-Center Strike Error (Up to $920)

An off-center strike happens when the planchet isn’t properly seated before the dies come down. The coin receives only a partial impression, leaving a crescent-shaped blank area where no design appears.

The 2006-P specimen that sold for $920 was approximately 40% off-center — a dramatic shift that removed a large portion of the state design while leaving enough to identify the coin’s date and origin. On state quarters, off-center strikes are especially visual because the reverse state designs are asymmetric and detail-heavy. A 40% shift on a Nebraska quarter might remove Chimney Rock entirely, or on a Nevada quarter, slice the galloping horses in half. Higher percentages with readable dates and state identifiers command the strongest premiums.

Value: A 2006-P quarter graded MS62 with a 40% off-center strike sold for $920 on eBay in 2023. Minor shifts of 5–10% trade for $25 to $100. The sweet spot — 30–50% off-center with a visible date and identifiable state design — reaches $300 to $920 depending on grade. Dateless, stateless off-center quarters lose most of their premium.

How to Identify: Hold the coin flat. A crescent-shaped blank area should be visible. The struck portion should show sharp details; the blank area should be smooth, raw metal.

Check both sides — off-center strikes affect obverse and reverse equally. If only one face looks shifted, that’s a misaligned die error instead.

Weigh the coin. Standard 5.670 grams. No metal is added or removed in an off-center strike. Wrong weight with a blank crescent points to a clipped planchet.

Examine the reeded edge. Off-center quarters often show partial or absent reeding on the side where the blank crescent appears.

Fastest check: blank crescent on both sides, sharp details on the struck portion, correct weight.

Use Our 2006 Quarter Value Checker

 

6. 2006 Quarter Doubled Die Obverse Error (Up to $1,005)

Doubled die obverse errors originate during die production, not during coin striking. When the hub impresses the design onto a working die in two slightly misaligned passes, the die carries a permanent doubled image — and every coin struck from it shows identical doubling.

The 2006-P North Dakota quarter produced the most significant DDO for this year. Doubling appears on “IN GOD WE TRUST” and “LIBERTY” on the obverse — visible under 10x magnification as shadow letters with separation between the primary and secondary impressions. A separate “Doubled Ear” variety shows a secondary earlobe outline on Washington’s portrait and appears on P-mint North Dakota, Nebraska, and South Dakota quarters. The Doubled Ear is classified as Class VIII Tilted Hub doubling, but it’s a minor variety trading in the $5–$25 range.

Value: A 2006-P North Dakota quarter graded MS65 with an obverse doubled die sold for $1,005 at GreatCollections in 2023. The major DDO varieties with clear doubling on “IN GOD WE TRUST” and “LIBERTY” trade for $100 to $1,005 in uncirculated grades. The minor “Doubled Ear” variety trades for $5 to $25. Machine doubling — a flat, shelf-like distortion with zero collector value — is extremely common on 2006 quarters and gets confused for DDOs constantly.

How to Identify: Start with “IN GOD WE TRUST” and “LIBERTY” under 10x magnification. Look for shadow letters, thickened strokes, or clear separation between two impressions.

For the Doubled Ear variety, focus on Washington’s earlobe. A genuine doubled ear shows a distinct secondary earlobe outline below the primary ear — raised, rounded, and clearly separated.

The critical distinction: true doubled dies produce crisp, fully formed duplicate images with equal depth. Machine doubling creates flat, shelf-like distortion where one side of a letter looks smeared. Machine doubling is worthless. The 2006 quarters are plagued by machine doubling on the date, so don’t mistake flat smearing for a genuine DDO.

Check Wexler’s die variety listings for confirmed 2006-P North Dakota DDO die pairs.

Fastest check: crisp separated doubling on “IN GOD WE TRUST” with equal depth on both impressions.

Use Our 2006 Quarter Value Checker

 

7. 2006 Quarter Lamination / Air Bubble Error (Up to $1,320)

Lamination errors form when impurities or trapped gas bubbles weaken the bond between metal layers inside the planchet during manufacturing. The weakness causes the surface to crack, peel, bubble, or split away from the core after or during striking.

The 2006-D Nebraska quarter produced the most expensive lamination error for this year — a dramatic air bubble visible on the obverse that raised a significant portion of the surface into a blister. Air bubble lamination is a specific subtype where a pocket of trapped gas creates a raised dome on the coin’s surface. The bubble forms inside the metal strip before the planchet is even punched, making it a true production defect rather than a striking error. Larger bubbles and peeling sections that expose the copper core are the most dramatic and most valuable.

Value: A 2006-D Nebraska quarter graded MS66 with an air bubble lamination error sold for $1,320 on eBay in 2023. That’s the highest confirmed sale for any 2006 quarter error. Small lamination cracks add $10 to $50. Medium cracks or bubbles visible to the naked eye bring $50 to $300. Large peeling sections or dramatic air bubbles in uncirculated condition reach $500 to $1,320 depending on grade and visual impact.

How to Identify: Look for raised blisters, flaps of metal lifting from the surface, or cracked areas where the layers have separated. The defect should follow the metal’s internal grain structure rather than a straight mechanical line.

Under 10x magnification, genuine lamination errors show a natural, irregular fracture pattern. Air bubbles appear as smooth-topped domes with a defined perimeter. The exposed subsurface should look like raw metal — not rough, filed, or corroded.

Weigh the coin. If a piece of metal has physically separated and fallen away, the weight will be under 5.670 grams. Retained flaps and intact bubbles keep weight close to standard.

The critical distinction from post-mint damage: lamination errors show struck design details on the surrounding surface and follow the metal’s internal structure. Scratches and gouges disrupt the design.

Fastest check: a raised blister or natural metal flap with struck design detail on both sides of the defect.

Use Our 2006 Quarter Value Checker

 

Conclusion

The 2006 state quarter error market runs from $540 rim cuds to $1,320 lamination air bubbles, with struck throughs, die breaks, missing clad layers, off-center strikes, and doubled dies all trading between $735 and $1,005 in confirmed auction records. Five state designs in one year — Nevada, Nebraska, Colorado, North Dakota, and South Dakota — means five different reverse dies and five times the normal chance for die-specific errors. A 10x loupe, a gram scale (0.01g), and calipers cover every diagnostic you need.