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