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<p>[QUOTE=&quot;Any Jewelry, post: 590509, member: 2844&quot;]Gorgeous little crab, MT, and welcome.</p><p>Without testing it is impossible to say exactly what the little stones are.</p><p>Is the crab Australian made? 1970s maybe? Could we see a close-up of the mark?</p><p>If we know who made it, and when, it may be possible to find out what the other stones are. Otherwise you&#039;ll have to get this beauty tested by a jeweller who is also a gemologist.</p><p><br /></p><p>Strangely, light opals are called black opals by some, as long as they are solid, don&#039;t ask me why.<img src="styles/default/xenforo/smilies/confused.png" class="mceSmilie" alt=":confused:" unselectable="on" /> It seems black means solid in that case.</p><p>This one isn&#039;t solid, so it would simply be called a doublet or triplet. The top surface seems to be slightly convex, in which case it could be a triplet, consisting of three layers, the top one being a convex cap. We&#039;d have to see it sideways to ascertain it.</p><p><br /></p><p>For both doublets and triplets the opal is sliced in a thin layer which is glued onto a base of another material. The triplet is given an extra transparent protective layer, which is convex.</p><p><br /></p><p><img src="http://geology.com/gemstones/opal/opal-doublet-triplet.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>The opal is an Australian pinfire opal, and it looks very much like opals from Lightning Ridge in NW New South Wales. New South Wales is a state in the east, the best known city is Sydney.[/QUOTE]</p><p><br /></p>

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