A piece I put away a few years back--out of the old Norman Reid "Indian Hill Museum" sell-off, much of the material Edwards County, S.E> Illinois. Is the Chisel Hopewell or is it Mississippian Culture--one of the two is the best answer I can give as both cultures had a high appreciation for HIGHLY polished Kaolin Flint tools. Look up some Cahokia Site tools, you'll see what I mean--something about this colorful western Illinois-found flint, it took on a high gloss (when polished). Was this chisel an "everyday tool" or did it have some more 'decorative' purpose? That answer might be in how you view the work-made chips to the bit--seems odd to take a highly polished tool and pound on some harder surface--if that makes sense, it'd be like using your phone as a hammer...you just don't do it. So, how did the bit get dinged (and then lightly polished-over)? Speculation, guessing, is about all we have for an answer. Length is 2&7/8" by 1" with a center thickness of 7/16". Guarantee: So long as I'm alive it's guaranteed real--get a better deal than that...if you can, lol. Shipping is $9.00 USPS. I welcome checks, cash, or money orders but do not use paypal-type services--Roy A.