Back when I was a kid, my Dad used to sharpen all his own tools with a whetstone. This is a modern day whetstone, and how to use it:
I really enjoyed that video because it was instructive and funny. Unfortunately, the iVokh don’t have modern day tools, so the next step of my research was to see how primitive peoples sharpened things. This is what I found:
This video explains how to sharpen a stone arrowhead, but what I really want to know is how to sharpen a claw…a to’pak claw. Luckily, the tool used to knap the edge of the arrowhead is an antler, and antlers are made of bone. As an aside, the presenter sharpened his antler tool on a piece of sandstone. Yes! Getting closer.
And here, at last is what I was looking for – a [replica] black bear claw with a sharpish point that could be sharpened even further with that sandstone!
In the scene I’m currently writing, the Yellow sharpens a to’pak claw and uses it to carve Death’s hide…as a punishment. Thrilled that it’s possible in my world as well as theirs. 🙂