Hollywood, you've asked a legal question and no reply has addressed that and the only suggestion I have is to contact an attorney. Regarding the paint, dogs and furniture give away, I don't know how you place a value on that however, when I read below I do have a different opinion;
"I bought two really pretty diamond rings and asked her to marry me one day soon. She said of course and that she loved me"
In spite of what you've gotten from Elden and DB, I read this as her accepting a marriage proposal and if the asnwer is yes you have every right to expect the return of these rings. Depending on the value, I suggest looking into a small claims court action to recover the rings. There is a small filing fee and there are no attorneys involved, you simply present your case, she presents her defense and a jugge or trial magistrate decides for or against. Call the court house or sherrifs office and someone there will direct you to the proper offfice to initiate action.
Several years ago I paid a contractor for work he did not perform, and I took him to small claims and got every penny plus 14% interest. If you would like more information fromme on this send a note back and I'll be glad to assist. I would not let those rings go uncontested.