Take a look.
Useful link:
https://www.gia.edu/gems-gemology/fall-2017-labnotes-ethiopian-precious-opal-dyed-brown-bodycolor
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Tuesday, January 16, 2018
Ethiopian Precious Opal With A Dyed Brown Bodycolor
Labels:
Gems & Gemology,
GIA,
Jonathan Muyal,
Lab Notes,
opal
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