Black & silver solitaire ring

Black & silver solitaire ring in size 7.5 This looks like and has the weight of real silver, but there is no hallmark or brand markings, it does pass the magnet test though (silver is not magnetic) The stone looks like it could be onyx, but again, no markings New to Poshmark Canada? Use code STMTL when signing up and get 15$ off your first purchase!