Any experts on arrowheads?

I have 4 arrowheads and know nothing about them at all. I am sure it is hard to pinpoint just from a photo but if anyone is able to identify tribes or age estimate that would be great! #1 is 2 7/8" long, #2 is 1" long, #3 is 1 5/8" long, #4 is 1 3/16" long.

 

The first one is made from obsidian, but that is as far as I can go. Do you have any idea what continent they come from?

@DrPam has contributed on archeological artifacts before.

https://www.projectilepoints.net/Search/National_Search.html

 

It should be noted that points are frequently and easily reproduced, and have been for at least a hundred years. The best way to know they're genuine is if you are the one that picks them from the ground.

Is the second one broken, or finished on its bottom edge?

 

I know they were all purchased in the U.S. but not sure where as my Mom bought them. Thanks for the reference, very helpful!

 

The second one does not appear to be broken.

 

The first is a modern point, made in the last 50 year's or less. It is obsidian. The second and 4th are jasper the second and 4th also look authentic. The third looks like a Chinese or Mexican copy, that one is questionable. Yet pictures can be imperfect. The first I can tell is modern by how clean, and whole it is. Also the style is very modern unlike typical artifacts. I make arrowheads. I have collected and traded old one's. Most have alkali etching on one side, and tend to be broken in places.

 

Thanks 2manybooks, smallaxe and Voltaire for the input!

 

Your welcome.