What is it?

Today’s Daily Post asked What’s the oldest thing you own? And this is mine. Figured it out yet? Neal I know you know.
Hint: My mom collected rocks and fossils and most anything you can pick from the earth. We even went out meteorite hunting some Sunday afternoons. Seems the windblown parries of Northern Oklahoma and Kansas are good places to find celestial objects, as well as, critters from ancient sea beds.
Answer This is a trilobite probably from Early Cambrian period (521 million years ago) That’s old!!!

Wonderer’s What’s the Oldest thing you own?