Knight collaborated alongside With Clarity on her "bigger" 5-carat lab-grown diamond ring. She tells PEOPLE about ... Keltie Knight's Missing 4-Ct. Diamond 'Probably Stuck to the Bottom of ...

News reporter still hasn't found her missing 4-carat diamond. "This was a new ring I got for my 10-year anniversary — not my engagement ring, thank God," she tells PEOPLE. "I wore it every day ...