Doug, I did not deny that there could be a color difference/change in gold, just that it is a change that is not due to a "chemical reaction" of...
In relation to gold toning. The color of gold is determined by relativistic effects. Metals such as silver absorb and reflect photons of color...
In defense of the man, I do think that he is being "tarred with a large brush". His main objectives through out the book is that coins should not...
I was a Chairperson of a college Science, Math, and Engineering department for 20+ years. Engineers were easy to serve and understand. It was the...
Maybe the buyer thought it looked like a 1888/7, 1888/887. I can't tell from the photos if the markers are there. But an interesting question,...
The color progression, people often quote, is more complicated than a single grouping on silver coins. Here is a post where I give some links with...
Lehigh, I also am not the expert with these, just relying on the CPG. In a nearly identical thread recently you showed the same coin, and I...
My NGC submissions have the first part of the # on the coin, as the number on the submission form, and the number after the dash as the line...
Tony, it is a nice looking 3-Legger! There is some wear apparent on both sides and I think that AU 50-55 range is appropriate. Hard to tell in...
Jim, I got the info from the Cherry picker's guide, pgs 310-311. Both the 030 and the 30.3 are said to have doubling of the the LLO and CENTS...
What Bill means is that your photo doesn't appear to be the main DDR for 1945P, which is designated as FS-05-1945P-801 or by old designation...
I suspect there are many that fit this criteria, more than one thinks, but of course it is not provable. It is warm to feel that NCS has all of...
If conserving or "cleaning" ( or artificially toning or dipping for that matter) can not be detected on a coin, even by the TPG companies, or...
I am sorry about your camera, but the photos still are very small. Looking at the reverse, I can see some doubling effect on the LLO, but it...
I do not use the 7X, but their 10X is great for the price....
If it weighs the same as a normal pre-1982 cent, and is the same size it is most likely produced by this method. It is a very popular chemistry...
I have cardboard 2x2 holders over 25 years old, and all of the plastic with them is mylar film. If yours are not that old, they should be safe....
The hard plastic holders that you show, do not initiate the damage. PVC to be flexible ( unlike the hard PVC tubing for lawn watering sytems) has...
In this days economic situation, free room, board, medical care better than most, might be an incentive rather than a deterrent. Read where a 70+...
Many in the jewelry use area are low melt silver solders. Here is one for 430 F. Commonly used in silver jewelry repair/creation. Jim...
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