Oh, wow, that's a gorgeous gem. I had a geode forever and one day I met this old man who cuts them, so I gave it to him to cut for me. He took off with it and I never heard from him again! I still wonder what it looked like insideLot of agate around here, but I've never heard of sunstone. Me likey.
Sorry to hear about your geode. That is why I decided to start cutting my own rough because, I could not find someone trustworthy enough to send my stones to.