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<p>[QUOTE=&quot;Herodotus, post: 4639029, member: 111387&quot;]The base metal of most ancient coins not made of silver or gold(or a combination of) is copper, or copper mixed with other metals to make an alloy.</p><p><br /></p><p>Bronze is an alloy of primarily copper and tin.&nbsp; Although, other trace metals can also (and usually) make up the total composition of ancient coins such as: nickel and aluminum.</p><p><br /></p><p>Copper is also mixed with zinc to create brass.</p><p><br /></p><p>Most ancient coins are referred to as AE as there exact composition wasn&#039;t a set recipe copied by all across the board.</p><p><br /></p><p>Both copper and tin are shiny metals until they are exposed to oxygen and they begin to oxide(aka tarnishing).</p><p><br /></p><p>New bronze tubing:</p><p><img src="https://www.bccourier.com/wp-content/uploads/2020/02/Tin-Bronze.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p><br /></p><p>There is a good chance that your coin was either aggressively cleaned or the patina may have been scraped/damaged when it was getting shipped to you if improperly packed.</p><p><br /></p><p>In other words...</p><p><br /></p><p>While somewhat corroded, your coin is fine.[/QUOTE]</p><p><br /></p>

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