What is 526 stamped on a white metal ring?

i know this sounds like a really stupid answer, but have you tried turning the ring over, and reading it "upside down" because that could in fact be the right way up.... i thought my ring said "526" and then i turned it upside down and realised that it was in fact 925..... look at the 2 in the middle and try and see what way up it is meant to go.... that's the best answer i can give, hope that helps in some way Answer 2:

Normally those numbers (on any jewelry) are the quality and or quantity of precious metals involved.