1844: Artificial Petrification. They practiced it...

Petrification: the process by which organic matter exposed to minerals over a long period is turned into a stony substance.


I am not a chemist, and I do not know how long the long period of time is supposed to last. But here we have this:

If you give it a try, please let us know of the results ;)
Just ordered the book from Biblio. Where the heck do you find pebbles powder?? And WHAT is it? I'm on the hunt.

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