no idea what this stone is

You all may be getting tired of me asking what my own pieces are made with. This is a cab I got on line, and in my own defense, the picture I based my purchase on looked nothing like this. (I thought it was pink...) Anyway, I do like the shape of the stone and the optics and play of light. It's wrapped in 14k gold filled wire. Unlike some of my photos, this is a fairly realistic representation of the stone's color. As always, I welcome comments, critiques, ideas, thanks.