Very Large Carved/Turned Quartzite Bead

The bead is about 1.3 inches wide and 1.75 inches long and has been drilled. I'm pretty sure it's made of something like quartzite. The whole bead is a bit primitive. I found it in the 50 ct box at my local thrift store. I've never seen such a large and heavy stone bead before. I wonder what it was used for? if it was on a necklace, it could easily take an eye out if the person wearing it were to fall. Any info appreciated. Thank you!