This bracelet is made with a 12mm black onyx stone and 6mm pink stripe agate, hematite and black tourmaline bead stones. All of these stones genuine. It is strung on high endurance stretch elastic and measures 7 inches and is quality tested for durability. Beneficial in yoga, meditation, chakra balancing, reiki and energy work. Black onyx can help release negative emotions such as sorrow and grief. Agates are grounding stones, bringing about an emotional physical and intellectual balance. They aid in centering and stabilizing physical energy. Hematite grounds and protects us. It strengthens our connection with the earth, making us feel safe and secure. It endows us with courage, strength, endurance and vitality. A "stone for the mind", Hematite stimulates concentration and focus, enhancing memory and original thought.Black Tourmaline is a powerful stone for protection against negative energy of all kinds, as well as being a strong spiritual grounding stone. This stone is a powerful asset to your health, as it not only removes the negative energy but by changing it to positive energy it has an excellent effect on your well being.