These are double-strand pearl earrings. They have been appraised by a pawn shop. The length is 80cm, measured by an amateur. I've used them about twice, but haven't had the opportunity to wear them since. Even without use, the string weakens, so I've had the string replaced twice. The second time was three years ago. The number of pearls checked during the string replacement is written on the case (photo 5). I've priced them accordingly.