Hello, I was out digging this morning at my favorite 2nd Seminole war fort. I was digging where I’ve found many artifacts over the years and about a foot down this popped out. It’s possibly greenstone which leads me to think it maybe Native American. I’ve found a couple similar objects before. There a bunch of scored lines possibly for arrowhead sharpening or could it be an historic sharpener for soldiers knives. The fort had a creek nearby and there have been a number of points found by nearby residents over the years. You be the judge any any insight would be greatly appreciated. Happy Hunting!