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V19 2016 INDEX       E-SYLUM ARCHIVE

The E-Sylum: Volume 19, Number 50, December 11, 2016, Article 11

VOCABULARY TERM: ORANGE PEEL

Dick Johnson submitted this entry from his Encyclopedia of Coin and Medal Terminology. Thanks! -Editor

Vocabulary Orange Peeling1

Vocabulary Orange Peeling2

Top: Orange peel effect is evident on a proof 1886 double eagle coin even after the die had been proof polished to a mirror finish.
Bottom: An 1908 eagle proof with less effect, evidence it has occurred in both centuries.
Photos: Heritage Auctions.

Orange Peel. A numismatic item with an uneven granular surface similar to that of an orange. Such a surface is most evident in the field of a coin which should be smooth, but can occur on the entire surface. While rare, is has been observed on both 19th and 20th century proof coins. Authorities believe the condition is due to an excessive grain size abnormality introduced by heat treating of the metal during the ANNEALING of planchets before coining. Numismatist Roger W. Burdette stated in an 1981 article “It results from a shifting of individual coarse grains relative to one another, in extreme cases to such an extent that the grain boundaries become apparent to the naked eye.”
CLASS 08.9

Dick adds:

This entry was not in the original pre-print of the manuscript of my Encyclopedia, but will be added in future. It was suggested and described by Roger Burdette. I contacted Mark Borckardt for additional information.

Mark Borckardt writes:

I have been using Orange Peel for many years, and I am not the first. Here is the earliest appearance of the term in the Heritage archives from 1993.

1862 1C
NGC 1862 MS 64. Attractive iridescent orange-peel toning about the obverse periphery.

Thanks. I hadn't encountered this expression before, but it makes sense. Dick's creating a very valuable numismatic reference work. -Editor


Wayne Homren, Editor

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