we know the clasp has been replaced.it has no marking anywere it was almost a inch underground.i looked for sliver worn spots black spots did not see any.. i did some home test with a magnet and it did not stick to it..and a test that i thought was funny my wife wares makeup so i rubbed it on my wifes face and there was a black mark were i rubbed. and i been told if it does leave a black mark than it might be real.i work at a pawn shop so i can do a acid test on it to know for sure i will let you know for sure.being it was in the wet ground it should show some kinda sign of not being real. i know the clasp is fake or got a copper center..but thanks for the info that u gave me..