u/DisasterTricky4536

Ive had this necklace for years, i took it a few years ago to see if a pawnshop could tell me what it meant and or what type of metal it is, they wouldnt test it claimed it was -copper nickel zinc- as if he could tell without testing it. It has sat in a draw no tarnish any answers are welcome, thanks for time and help! p.s. picture isnt too clear, it is a square with dot in middle