Major head scratcher!!

[autographcollector11]

This is interesting. I'm guessing it's limestone, but has a graver tip. What do u think? Found in a farm in Iowa w/other tools....

 

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[quito]

Over here in eastern South Dakota, I find many scrapers large and small with that same feature. Nice one!

 

[autographcollector11]

Thanks. I can't quite figure if it is limestone or low grade chert. It has some crystalline features-albeit minimal.
any ideas?

 

[quito]

I have no idea on material. There is such an assortment of materials available in this region it's really hard to say.