Vintage Carved Floral Earrings

An unusual pair of earrings 1-1/4" in diameter. I haven't been able to determine whether these are bone, or early plastic. I do know that they do not test ivory. They are a creamy ivory color intricately carved in a floral design. There are settings in the flowers which look like they could hold a stone, but there were none present. They look fine without any additions. Nicely mounted into a silvertone outline frame. They are clip on style and very comfortable.