It's not quite clear what you mean. ALL coins are made in mints, by definition. If you mean a MINT STATE coin, it's a coin that's exactly as it was when it was struck, without being in circulation....
I believe that you are referring to Yap, an island in the Pacific which historically used large stone discs with a hole in the center (like a millstone used to grind grain) as money. These "coins"...
No. Standard cents, nickels and dimes were struck with the dates 1975 and 1976. It was felt that these coins were too small to effectively display a Bicentennial picture. Quarters, halves, and...