Heat. This was damaged after it left the mint. It's still worth a dime...if you can spend it. Welcome to the mix here at CT.
It split from the heat. If you take it to your bank they should exchange it for a spendable Dime. Since it only a dime I’d be tempted to keep it as one normally does not see that.
Yup post/after mint damage.. most likely fire and still worth a dime, though some idiot on etsy will likely give you a 20 for it lol...
I'm going to go with PSD, as others have said because of the images and since there is so much damage to it. A lot of the discoloration looks like environmental damage and is even on the inside of the separation. The "wrinkle" on his forehead looks like a product of excessive heat as well and is over the separated area. That being said, the devices and lettering do appear to be visible inside the separation. Please correct me if I'm wrong, but I believe that might be visible on a true "clam shell" Split coin.
I don't think so. The clad was somehow pulled apart post mint. You would still see the faint lettering underneath.
The heat and other environmental damage to the coin might have caused the 'clamshell' as part of it, but it would not be certifiable because I'm certain it did not separate naturally.
Bring it to the bank and ask for a replacement dime. Bank's usually will replace damaged currency with undamaged currency at no charge. Or you can do what I do quite a bit, throw it in a place where people frequently metal detect. This way it adds excitement to those metal detecting when they hear the tone go on, and, in some cases the coins are then added to a collection of found coins, thus proving a new home to a once homeless damaged coin.
Leave it in a CoinStar reject slot and we can see it again, again, again. Just kidding. The answers you received above should tell you it does not have any additional value above a dime, or NAV.