I used real red cinnabar paste to make the print. It was a real hassle to make the intaglio space between the fingers: the carving tool I bought is too big and unwieldy for the finer scratchings -- so I used mom's etching needle for that. That's why it only worked on the third try.
I traced the design onto the stone with carbon paper and then traced that with a CD marker. That worked, kind of... The marker is a bit thick (or the stone is too porous) to make really fine lines with it, and with this design at this size, every little detail counts.
It's a bit finnicky, but nothing I can't handle after cutting so many stamps. Using the etching needle for the finer points worked quite well!