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<p>[QUOTE=&quot;desertgem, post: 2934415, member: 15199&quot;]Because they are metallic bond, rather than covalent or ionic, they would maintain the color of the original metal. The same for the &#039;shine&#039; if you are referring to reflection of the wavelengths of light that gives them that visual color. If you are talking about &#039;toning&#039; or patina of say silver, that is created by interaction of other nonmetallic atoms to form compounds that can have different colors. The above process is to eliminate those atoms from the metal.[/QUOTE]</p><p><br /></p>

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