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<p>[QUOTE=&quot;Info Sponge, post: 824941, member: 20538&quot;]Bear with me, please -- sometimes I&#039;m not satisfied until I&#039;ve chewed an idea into pieces all over the carpet. </p><p><br /></p><p>So a mirror does not have luster? There&#039;s none of the diffuse reflection from flow lines that makes a coin look like a coin?</p><p><br /></p><p>A deep mirror proof coin does have luster? Even though you can see reflections in it, the flow lines still make it something other than as flat as a mirror? If I handle such a proof coin someday, will I see cartwheeling?</p><p><br /></p><p>Does everybody except me know about this? If I ask people at a local coin club to show me examples, will they know what I&#039;m asking and will they be able to tell and show me what to look for?</p><p><br /></p><p>Doug, are you sure &quot;refraction&quot; is what you mean? In physics, that specifically means the bending of light as it&#039;s transmitted through something (e.g. a lens, a layer of sulfide on a toned coin, etc.). Is there any transmission going on, or is it all different kinds of reflection?[/QUOTE]</p><p><br /></p>

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