Huge Vintage Mexico Sterling Black Onyx Ring

Lovely and large vintage sterling ring from Mexico features a large bezel set black onyx (appox 1 1/8 by 1/2". The stone is surrounded with scalloped silver embellished with stamped designs. Ring top measures 1 5/8 by 1 1/8". Ring is a size 7, band is 3.5mm wide and nice and thick. Signed Mexico 925 and TM -142.