mildlyinteresting-blog:https://ift.tt/2K65Eho “this glass skull has turned from clear to pink over 7
mildlyinteresting-blog:https://ift.tt/2K65Eho “this glass skull has turned from clear to pink over 7 years of sitting on a sunny windowsill”It’s become solarized! This is something that we see fairly often with glass finds. The glass turns purple because it contains manganese, which becomes purple when exposed to ultraviolet radiation!This glass has also been solarized, but to a lesser extent. -- source link
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