Owen Muir is suing ex-fiancee to get $40,000 ring back Diamonds are forever, unless they cost $40,000. DIAMONDS are forever - but one engagement ring sure wasn't. A Brooklyn man is suing his ex after she refused to return a $40,000, white-gold diamond ring, according to court papers. Owen Muir handed over the family ring to Stephanie Foley in August 2012, the New York Post reported. But after the breakup, he decided a judge was needed to force Ms Foley to give back the ring - or its cash value. Ms Foley could not be reached for comment. Mr Muir isn't the first to sue over a relationship gone wrong. A British woman tried to sue her former lawyers for failing to properly explain to her that getting a divorce would actually end her marriage. Jane Mulcahy claimed her lawyers were negligent because they didn't take into account her Roman Catholic faith when they provided her with marriage advice. She went on to claim her lawyers should have recommended a judicial separation instead of a divorce, but the case was rejected by the court.