SS Long Oval Ring w/3 Stones

This ring is a 1.5” oval design that has a black,red and transparent greenish stone. The sides taper to a 4mm band that overlaps which would make it adjustable. Don’t worry this isn’t a cheaply made ring. The overlap is tight and won’t “catch“ on clothing. It would be best to take to a jeweler to resize as I can’t even pull it apart. The markings are Mexico 925 TE 25