Identify unknown native American stone tool

[Gabe999]

It fits in you hand like a grip as if it was molded like with clay. I saw a similar stone tool that is all black that was molded to fit in a hand. Please help me identify this thanks it was found in Pennsylvania fixing a pipe after digging deep in my yard.

 

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[VERMONTIS]

Welcome!! How wide is your laminate flooring? Trying to see size.... Is the bottom flat.. What is it made of ,slate?

 

[Gabe999]

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This is the side view

 

[Gabe999]

The bottom is flat the size is about 4 inches long and I don't think it is slate I posted a side view below thanks

 

[GA_Boy]

May be for grinding grain.
Marvin

S4 Hoe
Size: 4 1/2" long, 2 1/4<" wide, 3/4>" thick
Material: White Chert
Age: Middle Woodland (2,200 – 1,800 BP)
American Indian Tools: General purpose scraping and digging
Provenance: Illinois, Knox County
Date found: From the Fred Smith Collection. Mr. Smith was an avid local collector who’s had Indian artifacts displayed in Lar Hothem’s numerous guide books. May 2009 Auction, Galesburg, IL
Price: $115

 

[Treasure_Hunter]

Sorry I'm only seeing natural weathered stone.