They did it by hand almost as good as we could with our drills!Here is a great example of a drilled hole in an artifact.I believe this to be either a broken gorget or whetstone.
These pictures demonstrate the technique of drilling from both sidesView attachment 2120171View attachment 2120172View attachment 2120173View attachment 2120174
Congratulations on your Gorget find!I actually found a small Gorget last year. One end is broken and made from schist. My one and only so far.
Thanks I was surprised as to how small it was. Maybe I will post it soon againCongratulations on your Gorget find!