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<p>[QUOTE=&quot;Insider, post: 8336339, member: 24314&quot;]The word &quot;<span style="color: #b30000">striation</span>&quot; can be used to describe several things.&nbsp; For example, even the <span style="color: #660033"><i>layers of color</i></span>ed rocks in the Grand Canyon.&nbsp; Therefore, those members posting coins with streaks of color are technically correct.&nbsp; I have only used the word to describe <span style="color: #b30000">a minute, linear groove</span> (parallel if more than one) <span style="color: #b30000">into the surface of a coin.</span>&nbsp; While they look like scratches (technically they are), they occur because of something in the minting process.&nbsp; <span style="color: #660033"><i>Scratches</i></span> are PMD.&nbsp; <span style="color: #660033"><i>Adjustment marks</i></span> are technically both scratches and striae that occur during the minting process; <b>BUT</b>, just as a scratch they have a specific name.&nbsp; So do streaks of color on a coin.&nbsp; Very often, striations (and adjustment marks) disappear or weaken when the planchet is struck.&nbsp; Under magnification , the area inside stria is the color of the unstruck planchet.&nbsp; Here are some examples:</p><p><br /></p><p>[ATTACH=full]1478028[/ATTACH]</p><p><br /></p><p><br /></p><p>[ATTACH=full]1478029[/ATTACH][/QUOTE]</p><p><br /></p>

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