I purchased this from the TV shopping channel Shop Channel about 25 years ago. It was too bulky for me, so I hardly ever used it. I've forgotten the mineral name. It was a name of more than six katakana characters. It is definitely a gemstone. The cushion cut of the large stone in the center is beautiful, and the stones on both sides are also quite large. It's a ring from the long-established American jewelry maker "Samuel Aaron." There is a brand stamp "THL" and a 10K stamp indicating 10-karat gold. Ring only. There are no accessories such as a box. Thank you for looking.