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<p>[QUOTE=&quot;desertgem, post: 2242636, member: 15199&quot;]The ones given were for pure metal, as once into alloys, the hardness varies according to what the other added metals happen to be ( silver, copper, zinc, even nickel for low carat gold alloys.</p><p><br /></p><p>24K 2.5Moh</p><p>18K 2.75</p><p>14K 3-4 * more variability to alloyed metals</p><p><br /></p><p>About the only alloy of silver of interest is Sterling, and as long as it is 92.5% silver, the rest can be copper or other metal alloyed to increase the hardness, such as copper. But&nbsp; due to the metallic bonding of copper and silver, the peak hardness is 20% - 60% copper, and softer on either side <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />&nbsp; Sorry the chart uses a different hardness scale, but relative wise close to same.</p><p><br /></p><p><img src="http://riograndeblog.com/wp-content/uploads/2012/11/CAllendenHardness3.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p>from:<a href="http://www.riogrande.com" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.riogrande.com" rel="nofollow">http://www.riogrande.com</a>[/QUOTE]</p><p><br /></p>

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