What Kind Of Coin? Found During Metal Detecting Also I Scratched The Coin

That is a One Mark coin from the reign of Charles(or Carl) XI of the Swedish Empire.

That is an extremely nice find. Although it's hard to tell from the picture, the scratches appear to have a level of oxidation that's consistent with the rest of the coin, which suggests that they are old. Orderly scratches in the flat field of a coin's design suggests that they were carefully made by someone who was trying to see whether the coin was plated (fake) or solid. It's been a long time since that coin would've been used in a transaction.

This link will give you some idea of the value, which is highly condition dependent: https://www.NGCcoin.com/price-guide...-duid-287247 Although I'm *not* confident in my ability to accurately grade coins that are this old, off the cuff, I'd guess that your coin would grade Fine without the scratches. The scratches are a big deal though so I would expect them to reduce the value to that of a coin that was Very Good or so. But again, all of this is subjective and, particularly with uncommon old coins, it really depends on having an interested buyer and what they are willing to pay. Don't clean it any more and try not to touch it with your bare hands. Until you can put it in a proper coin holder, a ziplock bag is pretty good protection (they keep oxygen and oily fingers away and they aren't made with PVC).