Baishitop Black Lava Rock Bracelet, Beaded Bracelet Tibet Charm Elastic Bracelet Material: Alloy,Agate,vesuvianite It is designer for unsix, men,women is ok. Each beads is unparalleled that it is nature's masterpieces. It is special design that black lava rock with 3 different color beads You can adjust to the most comfortable size for you due to the elastic string