Unique jewelry. Can be worn with any style, from bohemian, hippie, rocker, biker, casual, to a more dressed up look. Held up to the light, this stone has pretty coloring with different shades of blue. I think it is a fluorite stone. All of these pieces are very versatile and add a special something to whatever you are wearing. I love this piece, it reminds me of a planet orbiting in space.