Not flint.

Ok, my next question would be did the Indians only use flint for arrowheads?

This was a sandy beach and barely exposed were theses rocks. The red river water was a foot away. Pretty remote area

So I picked them up thinking they could be flint

Which made me think I wish I had a shovel I would like to dig around

I’ve found one arrowhead in my life...

Today I was at our place on the red river in Oklahoma and found these at the waters edge

Is this flint rock?

have you tried hitting the lower right stone with some jap steel to see if you can get sparks?

Points I have found along the red river valley where not only made of chert, but a lot where made of quartzite and of petrified wood. The river has flooded and deposited sediment so many times most points right on the river are probably very deep. Then too where the river is now very likely is not where the river was 500 to 5000+ years ago. There still could be stuff in the river, but I would first look over eroded areas on terraces above the river bed. Rather than cobbles look for flakes and chipped rocks and cores washing out and when you start seeing those, slow down and really look close for points. That flat bottomland along the river has been building up with sediment quite a bit since the red man has moved on. Look for the land features that would not likely have changed much over time that would have made good camps, lookouts, hunting vantage points, for growing crops, foards, saddles, etc.