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<p>[QUOTE=&quot;Bronwen, post: 322319, member: 5833&quot;]Commercial jewellery dip does something similar for scuffed up gemstones: leaves a residue of some kind of polymer on the surface, filling in fine scratches, creating a smoother, shinier stone, at least temporarily.&nbsp; It will do this with cameos too, but I don&#039;t like the plastic-y feel afterward.</p><p><br /></p><p>Tortoiseshell can just crumble if it gets too dried out.&nbsp; It is essentially the protein product keratin, so has very different care requirements from shell/coral/pearl, which are really mineral in nature.[/QUOTE]</p><p><br /></p>

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