Material--The obsidian beads are made of Hematite Stone,rich in rare minerals,which helps to promote energy to the human body,they can balance the focus and blood circulation system. Obsidian Bracelets--Black magnetic obsidian protects from stress,bad dreams and is said to protect children from danger.It brings prosperity and creates an appreciation of nature,closely related to the root chakra. Magnetic Therapy Bracelets--Obsidian is produced from volcanoes, which can strengthen the kidneys, absorb disease gas and help sleep. With proper exercise and a low-sugar, low-salt, and high-protein diet, it has a significant weight loss effect. Great Gift--These bright black Bracelets will be a special gifts for teens,girls,mother,daughter,friends,BFF,couples,sister or family members.You can wear them in any occasions,such as Christmas Day,Valentine's day,Mother's day,Birthday,Anniversary,Graduation,Engagement or a particular party. Satisfaction Service--100% BRAND NEW and MONEY BACK SERVICE!Please feel free to contact us if you have any question!