I was wondering if anyone has seen anything like these raised copper color pieces in their tetsubin. They have an almost inky black base with a copper sheen and they’re surrounded by what looks almost like an oil stain. There are also little clear shimmery parts (something akin to clear nail polish).
This tetsubin was purchased as a vintage piece and I am not aware of it’s history of use (as in, I’m not sure if it was ever used in a way that it was not intended to be used).
I didn’t know if this was the result of common misuse or indicative of it being used for melting other metals / materials.
Any information or insight is greatly appreciated.
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