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Brutalist sterling and opal?
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<p>[QUOTE="Hollyblue, post: 4406179, member: 1496"]Natural black opal has a black base with color flashes,matrix opal can look like sandstone with color flashes.</p><p><br /></p><p><a href="https://www.gia.edu/doc/SU91A3.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.gia.edu/doc/SU91A3.pdf" rel="nofollow">https://www.gia.edu/doc/SU91A3.pdf</a></p><p><br /></p><p>[MEDIA=youtube]wzQlApAqaNs[/MEDIA][/QUOTE]</p><p><br /></p>
[QUOTE="Hollyblue, post: 4406179, member: 1496"]Natural black opal has a black base with color flashes,matrix opal can look like sandstone with color flashes. [URL]https://www.gia.edu/doc/SU91A3.pdf[/URL] [MEDIA=youtube]wzQlApAqaNs[/MEDIA][/QUOTE]
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Brutalist sterling and opal?
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