yes you are right. after looking it up it is russian silver guess you learn something new every day. it weights 12.5 grams, it,s a size 12 so it's a big one. :)
it's got 12 in it for size, than 84 and some makers marks, the turquoise and onyx are real the ring is about 20 years old, i don't think it is silver though. it's a big hevey ring.