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<p>[QUOTE=&quot;Bronwen, post: 9592460, member: 5833&quot;]Yes, exactly that, pretty much.&nbsp; Sardonyx applies to agate with layers of sard, dark reddish brown chalcedony (cornelian with a tan) &amp; onyx, the name of which comes from the Greek for fingernail, translucent white.&nbsp; Black onyx should be called that, but &#039;onyx&#039; with qualification has become routine for that material.</p><p><br /></p><p>Shell that resembles sardonyx in coloring may be called sardonyx shell.&nbsp; Cameos made from the shell should not be described simply as sardonyx; it should be specified that the material is shell, not hardstone.[/QUOTE]</p><p><br /></p>

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