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<p>[QUOTE=&quot;Bronwen, post: 2585158, member: 5833&quot;]Do you not regard the nacreous lining of abalone shells as MOP?&nbsp; I use MOP for any kind of nacre, &amp; then qualify it as MOP from abalone or paua , or MOP from oyster or clam (if I know).</p><p><br /></p><p>In this case, I see the colorful iridescence that suggests abalone.&nbsp; However, I think the white nacreous layer below the figure rules it out.&nbsp; Pardon the less than sharp photo, struggling with a new camera, but I think this mid-20th cameo is the same material:</p><p><br /></p><p>[ATTACH=full]270914[/ATTACH]</p><p><br /></p><p>And I think it is some species of clam. Can&#039;t recall ever seeing a cameo that was clearly abalone.&nbsp; You could maybe engrave on it, the way they do on oyster shell.&nbsp; Suspect the structure does not lend itself to the cameo form.&nbsp; (BTW - the cameos sometimes listed as &#039;oyster shell&#039; are not.)[/QUOTE]</p><p><br /></p>

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