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Testing for hydrophane without drowning the stone

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Testing for hydrophane without drowning the stone

Posted: Tue Nov 29, 2022 9:04 pm
by SwordfishMining
This is a older article from GIA so I will leave the link for it first. A drop of water can do it.
https://www.gia.edu/gems-gemology/fa13-ln-technique-hydrophane-opal#
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