Non flint arrowheads?

[ealewis1]

I'm wondering if I these are legit arrowheads. Will I only find arrowheads made from flint/chert or were ancient arrowheads made from different material. Our farm has granite, limestone, blue stone, chert, flint, quartz and shale. I'm not sure what these are made of, but they are not breakable. I know #10 really doesn't look like a point - there was just something about them though - or at least I thought there was...#9 is super strong and the side points are so symmetrical that I thought ancient native americans might have used another type of rock other than flint. NW Georgia

 

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[uniface]

Anything with an edge, like nr. 9, could have been useful.

 

[Indian Steve]

I think that if you were to break them or chip them , you would see flint or chert inside. The white is a patina from age & soil conditions