@SocGlassTech is the iridescence due to corrosion or deliberate?
Replying to @tptcruiser @SocGlassTech
It's due to corrosion, e.g. http://www.toledomuseum.org/kiosk/ancient-asian-european-glass/ancient-glass/ancient-glass-in-the-study-gallery/why-is-some-ancient-glass-iridescent/ …
2:07 AM - 2 Feb 2017
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