Rock?? Fossil?? Arrow Head??? Tool??? What the heck is it?

[creskol]

1 3/4 inches long
1 1/6 inches wide
about 1/4 of an inch thick along the center line and tapers to sharp edges
slight longitudinal curve
sort of a black/blue stone with lots of little swirl lines

Any Ideas? Thanks a bunch!

 

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[creskol]

Petrified screwdriver handle...
lost from the first guy who used a screwdriver to recover a target.

:P

... and here I thought it was the blade section of a crappy old sand scoop.

 

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[unclemac]

congratulations on a TRUE, NA "What is it?" This one isn't obvious.

 

[Relicgrubber]

It’s a Scud imo…