This is an interesting ring it either has an unusual setting, a unusual Faceted Opal I took it to the jeweler to be sure. I had this older lady offer it to me for sale. She couldn't remember what the setting was. The stone is luminous blue light in it. It has bevels across the stone gem face. There are three little diamonds on the left side of the gem. It is 10K yellow gold. It will come in a new ring box ready to give as a gift. It is 10K yellow gold. For you from Kansas.