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<p>[QUOTE=&quot;Marine1, post: 2503712, member: 80257&quot;]This star comparison was just used to illustrate an example of how photon spectrometers work and&nbsp; NOT how I use it&nbsp; with toned coins. What I did not mention was the <u>Order of the coloration as illustrated by the sunnywood chart</u> and this order of color especially Series 1 and 2 is the criteria that is used to determine reasonable authenticity. I get the best results using a slit size of .5 mm and sample the color data from top to bottom of the coin image about 100 passes similar to a MRI. The brightness is mostly irrelevant and the accuracy is 4.1 pixels/2.5 ang. units</p><p>The coloration varies with the type of Coin Morgan, Peace, Halves, Etc. and I use the Sunnywood Collection shown on PCGS and my own collection of Toners as my comparatives and baseline. I believe the results are somewhat subjective but have found them to be 70-80% accurate detecting Fugazi toners. nuff said ??.</p><p>I am going up north to fish and drink beer for a couple of weeks and will put up some pics of my work when I return and by the way light is refracted from the toned silver and being old school I like sundials.</p><p>M1</p><p>[ATTACH=full]531639[/ATTACH][/QUOTE]</p><p><br /></p>

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