Glass Sponge?

Fenix_XIII

Premium Member
Hello everyone,  I'm hoping someone can ID this weird growth that sprung up out of no where. It's about the size of a quarter and looks like a glass sponge.  My first instinct was that it was some dried up super glue but then it started growing and the honeycomb-like structure is too symmetrical. I have poked at it with some tongs and it feels hard. Any way, any help would be appreciated.  I've attached the most recent pics of it.  View attachment 4928
 
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