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<p>[QUOTE=&quot;kyratango, post: 517182, member: 5006&quot;]Confirm rainbow obsidian!</p><p><br /></p><p><a href="http://www.rikoo.com/pro/2801189.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.rikoo.com/pro/2801189.html" rel="nofollow">http://www.rikoo.com/pro/2801189.html</a></p><p><img src="http://www.rikoo.com/ProductImage/2801189/Rainbow-Obsidian-Ring,-01.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>From wiki pedia the&nbsp; <a href="https://en.wikipedia.org/wiki/Iridescence" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Iridescence" rel="nofollow">iridescent</a>, rainbow-like sheen (<i>rainbow obsidian</i>) is caused by inclusions of <a href="https://en.wikipedia.org/wiki/Magnetite" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Magnetite" rel="nofollow">magnetite</a> <a href="https://en.wikipedia.org/wiki/Nanoparticle" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Nanoparticle" rel="nofollow">nanoparticles</a>[/QUOTE]</p><p><br /></p>

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