Item Name: Black Onyx Crystal Necklace | Protection & Root Chakra Healing Material: Natural Black Onyx Crystal Stone. Size/Dimension: 6 mm Beads Certification: Yes, OSOC™ Certified. Know More about OSOC™ Click Here Uses/Benefit: It is very know in Feng shui as it Protect from Evil Eye. Its a Master Fortune as it shield you from all Troubles It also keep nervous system check It is a Birth Stone for Leo It also helps in Anger Management, as it increase Self-Control Declaration: As these necklace is made from Natural Stone beads, So there might be a chance that Color/lines might differ. and small holes, crack marks on the surface or inside the stones are often visible. About Product: Crystals are thought to add an extra element of healing to the treatment by helping to release emotional, mental, or spiritual blocks. Crystals may be placed on or around your body or you may be asked to hold a crystal.