This is a eudialyte bracelet. As shown in the third picture, it glows red like flames when exposed to a UV light. Inner diameter is about 15cm. Over 8.5mm. Brand new, unused. As it is a natural stone, there may be inclusions or small scratches, please understand. I am also selling many other natural stones. #IZUMI_NaturalStones Please take a look here. Combined shipping is possible, so please feel free to contact me in the comments.