I’ve seen some nice crosses made and geometrics, plus the usual points.
https://www.artofishi.com/shop/flint-knapped-arrowhead-necklace-for-sale/ocean-wave-agate-cross-necklace/
I need to get back to it, my grandkids are growing fast and will soon be ready.
Very pretty, and it looks like a fun craft, though not for the living room.
Don’t forget to tell the grandkid heroic war stories about how you had to get them into your possession. :)