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<p>[QUOTE=&quot;Any Jewelry, post: 11550105, member: 2844&quot;]With opals a convex front and closed setting means triplet. If you look at the stone from the side, you don&#039;t see the opal but the transparent material of the top layer of the triplet.</p><p>The colours move, so it is a genuine opal triplet with gorgeous colours. My mother used to say this type looks like French cathedral windows. That said, it could have a dark backing to enhance the intensity of the blue.</p><p>There seems to be a scratch through the top layer.</p><p><br /></p><p>If an opal is solid, the back is open to show the stone. The front is often convex but not always. If you look at it from the side it is all opal.</p><p>A doublet is a slice of opal on a backing. It usually has a closed back as well.[/QUOTE]</p><p><br /></p>

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