This is purple mica. It's a beautiful stone, like a grape. I've kept it for my collection. The first photo was taken in natural light. The size is approximately 11mm x 17 beads. The inner diameter is about 17cm. As it is a natural stone, there may be scratches or chips. Purple mica (lepidolite) is said to be a spiritual stone called the "stone of transformation," which is effective when you are at a turning point in your life and want to change. That's what I've heard. It's new and unused, but it has been stored by a private individual, so please refrain from purchasing if you are sensitive to such things.