A possibility, for that nice coin showing up there,is the person who lost it didn't know it was a gold coin to begin with. There are so many golden colored coins made and people don't expect to have real gold be in an assorted "accumulation" (versus collection). Seen some crazy stuff be pulled out of peoples pockets and personal "junk boxes". In the recent past while I've seen... a 1916 SLQ in Almost Uncirculated pulled from someones foreign mess. (They had no clue and were almost sick with shock!) A 1652 Pine Tree Shilling ( EF 45) unknowingly inlayed in a decorative box and pried out with a pocket knife! (Thankfully no damage.) Then a few years back I seen a proof 1839 large cent show up in a whatnot box. Add a kid, or just plain old Coinstar, and this kind of stuff can "hit the streets" (or tot lots) again!
What a nice find Larry.