Ryan Gill has dedicated his life to keeping ancient hunting techniques and traditions alive and preserving knowledge like this.
In this video, he explains, step by step, how to sharpen stone arrowheads to the point of being "crazy sharp" as they should be for a clean, humane kill. These are the same arrows Ryan himself uses on his own primitive bow hunts.
One of the best moments in this video is when he says:
"Primitive does not mean crude. Primitive just means without the influence of modern technology."
As you can see, making stone points is a tedious process. getting 12 points sharpened in one day is, as Ryan mentions, "a ridiculous number." But Ryan's point (no pun intended), in the end, is that although they may be less efficient to produce, stone arrowheads are no less efficient for killing game than contemporary ones.
If you are at all interested in archery or the history of bowhunting, or if you just appreciate someone who is truly dedicated to his craft, Ryan is a great person to follow on YouTube, and you can also purchase stone points and other primitive archery gear from Ryan here.