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Making opal
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=24&t=26008
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Author:  dchallener [ Tue Jan 12, 2021 12:31 am ]
Post subject:  Making opal

This is an interesting video not just because he discusses (and makes) some synthetic opal, but also because some of the techniques he discusses could potentially be used to make fragile opal (like Virgin Valley opal) become non-fragile.
https://youtu.be/d7MvGFX_VKo

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