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<p>[QUOTE=&quot;Bronwen, post: 694517, member: 5833&quot;]<a href="https://en.wikipedia.org/wiki/Ammolite" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Ammolite" rel="nofollow">https://en.wikipedia.org/wiki/Ammolite</a></p><p><br /></p><p>&#039;Reds and greens are the most commonly seen colors, owing to the greater fragility of the finer layers responsible for the blues.&#039;</p><p><br /></p><p>OP&#039;s is <i>very</i> blue-dominant.</p><p><br /></p><p>&#039;So-called &quot;frost shattering&quot; is common; exposed to the elements and compressed by sediments, the thin ammolite tends to crack and flake; prolonged exposure to sunlight can also lead to bleaching. The cracking results in a tessellated appearance, sometimes described as a &quot;<a href="https://en.wikipedia.org/wiki/Dragon" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Dragon" rel="nofollow">dragon</a> skin&quot; or &quot;<a href="https://en.wikipedia.org/wiki/Stained_glass" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Stained_glass" rel="nofollow">stained glass</a> window&quot; pattern.&#039;</p><p><br /></p><p><img src="https://upload.wikimedia.org/wikipedia/commons/2/2a/Ammolite.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>OP&#039;s clearly was deliberately fractured.&nbsp; Maker may have intended an ammolite appearance; I&#039;m not at all convinced it is ammolite.[/QUOTE]</p><p><br /></p>

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