Gotta go with @TIF and @svessien here. I have a few busted coins (not by my doing fortunately... nor an unwitting heavy thumbed lady. My heart goes out to you on that story @rrdenarius) And having busted coins is a pain. You did that to it. Now you must glue it.
From the original image, I would not have suspected the coin to be so embrittled. An exceptionally nice example for this late type (Fishman M56, with an altar-base beneath the reverse legend). Packaging (and impatience) does pose problems sometimes. I was once impatient opening one of those corrugated safety mailers and relized, to my horror, that I had torn, along with the mailer, the original (very old) collector tickets enclosed with the coins. I managed to tape the pieces back together but the accident haunts me to this day, reminding me to be very careful in removing coins from the packaging.
I've been fortunate and never broke an ancient/medieval coin (although my collection is small). However, broken pieces can also be a problem in one of my other collecting interests, German Porcelain Notgeld.
Ed, sell it on Etsy as a "Friendship Coin", you know, like those 2 piece charms they sell where 2 friends each keep half & they fit together like puzzle pieces! Etsy users will actually think it's a thing & you'll certainly get your money back & then some! Food for thought!...