This is a fluorite bracelet! The stone size is 10mm. The inner diameter is 17cm. It's a beautiful piece with a mix of colors ✼ Please take a look at the images for more details ✾ 【Fluorite】 Also known as the "stone of genius," it is said to bring forth clear thinking, enhance memory, and improve concentration. It is also effective as a healing stone, releasing suppressed emotions and healing the mind and body.