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<p>[QUOTE=&quot;Bronwen, post: 9766257, member: 5833&quot;]Is the top flat or convex?&nbsp; From the 1 blurry photo, it looks a bit like banded agate that has been prepared to be what is called nicolo.&nbsp; A thin white layer over a black one gives the effect of a blue surface.&nbsp; When engraved the design appears as black on blue.</p><p><br /></p><p>[ATTACH=full]480752[/ATTACH][/QUOTE]</p><p><br /></p>

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