That is referred to as a trilobyte spearpoint - and they did trade as a form of proto-money in Thrace and Skythia prior to the advent of coins. I have a few of them myself that I got in Ukraine.
nice artifacts everyone....i also can't afford a new hobby. but i like lookin' at you alls stuff. here's an artifact from my college days, found near indiana state university, circa 1991.
In 2000 years that would be considered "collector" grade. A great example although crushed, the paint is still intact.