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<p>[QUOTE=&quot;desertgem, post: 1000043, member: 15199&quot;]Annealing , as I understand the use in the mint&quot; is to soften the metal, and now that I reflect on my previous answer, I should say&nbsp; as you did, as I am not sure if it increases or decreases the amount of crystallization. The info I can google on the process says that annealing softens and strengthens the metal.&nbsp; I still think that the striking process of the dies,and the shape, height of the flow lines, the processing of the dies are responsible for, are the most important factors for the excessive ( rainbow) type of toning.</p><p><br /></p><p>I know you have more metallurgy experience than I, so I will defer to your explanation of the crystalline structure. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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