What is Die Abrasion Doubling?
From Susan Headley, former About.com Guide
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abrasions - Light rubbing or scuffing from friction, not to be confused with hairlines or bag marks.
adjustment marks - Small striations or file marks found on early United States coins.
Abrasion: A mark on a coin caused by contact with another coin.
Bagmark: A mark on a coin caused by contact with other coins when placed inside a bag for shipment to a bank.
abrasion - Scratches on the coins surface. This can happen with coin to coin contact or when a hard object comes in contact with the coin. Abrasions are not as deep of gashes as bag marks. Usually located on the highest parts of a coins design.
abrasion - marks or small scratches on the surface of a coin where another coin or object has slid across or bumped the coin. Can also be caused by the coin sliding in a holder or coin drawer. Not as deep or noticeable as bag marks.
Abrasions - An abrasion is an area of a coin where another coin or a foreign object has displaced metal in an abraded fashion.
abrasions
Light friction rubbing or scuffing which is different from hairlines and bag marks. Sometimes referred to as "cabinet friction" because many times it is caused by a sliding action in a coin cabinet.
abrasions Area(s) of a coin where a foreign object or another coin has displaced metal in an abraded fashion. Similar to a bag mark but usually on the high points or open fields and not as deep or acute as the former.
abrasion: light friction, a shallow scrape, or a mark on the surface of a coin.
abrasive: a harsh cleaning agent that destroys the surface of a coin.
Abrasions
Areas of a coin where another coin or a foreign object has displaced metal in an abraded fashion.
Adjustment marks ...
abrasions
Marks on a coin where another object has displaced metal in an abrasive manner.
adjustment marks ...
Abrasions caused by modern minting techniques where coins are struck and then dumped into a container. The coins crash into each other causing nicks and cuts around the edges.
Minor abrasions on an otherwise uncirculated coin, caused by contact between coins in a mint bag.
Bid
The price offered to buy a particular precious metal item.
Fortunate mark and abrasion free Indian and Buffalo enhance the sparking blue-silver luster radiating from every device. Placing this desirable condition rarity in an elite category all its own.
Abrasion on the surface of the coin and its location is a huge factor in grading a coin but it does not necessarily mean that abrasion can lower the grade of a coin.
There may be bag abrasions. Older coins may be tarnished or toned.
Brilliant Uncirculated (BU): Usually implies full mint lustre, in other words no toning or tarnish.
By this time the coin, if viewed under magnification, is apt to have a number of nicks and abrasions.
Very minor surface marks are noted, including a small abrasion on Liberty's cheek. Considerable die polish is visible on the reverse.
contact marks, bag marks: Minor abrasions on an otherwise Uncirculated coin, caused by handling in Mint-sewn bags and contact with other surfaces.
Bag Marks - Can be scratches or minor abrasions caused by coins knocking against each other in bags.
Because of their smaller size they usually have fewer abrasions than larger denomination coins.
When grading mint state pieces, note that this coin often comes with some parts of the design softly struck and may have many "bag" marks and abrasions.
The surfaces will show abrasions but these will be less detracting or heavily concentrated than on coins in the lower About Uncirculated grades.
A
Term Definition
Abrasions
Scuffs, slide marks, or other marks on a coin made by moving contact between the coin and another coin or the coin and a hard surface or object.
Marks and abrasions are usually detracting and numerous. Possible planchet flaw of some type may be present or minor rim ding. Hairlines may be numerous due to wiping at one time.
of the popular Doubled Dies and Repunched Mint Mark varieties from occurring, minor die variations, (often erroneously referred to as "minor errors)," such as die chips and/or die breaks, die cracks, missing designs due to die-wear and/or abrasion, ...
Contact Marks
Minor scratches and abrasions on uncirculated coins from being in contact or rubbing against other coins.
Counterfeit
Any coin that is not made by the authorized minting authority.
However, alteration by abrasion, etching, chemical degradation, or coatings can hide some indications of pressing.
There are two types of polishing: Adding a polish to the surface to fill in pits, or removing tarnish and abrasions. Both are a way to provide care for an object to extend its life and improve its performance.
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A superb-quality coin! Any abrasions are extremely light and do not detract from the coin's beauty in any way. The strike is extremely sharp (or full) and the luster is outstanding. This is a spectacular coin! ...
Many coins show light knocks and abrasions resulting from normal circulation, which must be considered in grading and valuing, for they are detractions even if they occurred in ancient times.
The surfaces are usually below average because of clashmarks and abrasions on both obverse and reverse. The 1844-D usually has thick, frosty luster.
Two Leaves under E in STAES. Fully struck and a real beautiful example. There are really no marks or abrasions to warrant the grade. The dies show heavy die polish on both sides, but this is a desirable aspect of the coin.
2 : Detracting Marks: a collective term for bag marks, contact marks, abrasions, rim nicks, hairlines, scratches etc.
3 : Lustre: degree of (for silver coins).
High Points - The areas of highest relief in a coin design. Usually the first to show evidence of wear or abrasion.
Hobo Nickel - A coin (usually a U.S. Buffalo nickel) re-engraved to produce a different image.
Brilliant Uncirculated (BU): Usually implies full mint lustre, with no toning or tarnish, should have no marks or abrasions, although such coins will have come into contact with other coins during production.
Poly Polyethylene. Small plastic envelopes one puts coins into to protect the surface from abrasion and grubby-fingered cretins.
In addition, less care was taken in their handling, and they frequently display nicks and abrasion, even when found in their original packaging. Proof coinage resumed in 1968, this time at the San Francisco Mint.
This grade refers to a heavily worn used note having several strong folds and creases, discoloration, edge tears, frayed corners, surface abrasions, stains, pinholes, and an overall poor appearance. No large pieces of the note are missing, however.
That's a good question. I don't know of any sure way to tell, but it would be a good idea thoroughly inspect it with a magnifying glass to make sure there aren't any suspicious abrasions.
Contact Marks Minor abrasions on uncirculated coinage from contact with other coins.
Small plastic envelopes one puts coins into to protect the surface from abrasion and grubby-fingered cretins. Pop Population.
 See also: Coin, Mint, Grade, Marks, Collector
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