Sort: Β 

Thank you soooo much... exactly it's the cast from the one of clay.... 😁 the mallet is for plaster, an really old one

I did something similar many years ago but with sand as a sculpting material and cement for the cast. You may find the techniques useful.
Here are some links to my posts about it.
https://peakd.com/art/@ammonite/duncannon-scroll-part-1-sand-cement-sculpture
https://peakd.com/art/@ammonite/duncannon-scroll-part-2-sand-cement-sculpture
https://peakd.com/art/@ammonite/duncannon-scroll-addendum-sand-cement-sculpture

Ah cool! Thanks for the info, it will be useful for sure πŸ™πŸ˜Š