8 mm Hematite & Lava Rock Stretchy Bracelet with large hole Matching Bead. Lava rock Beads can be used as a Diffuser for Essential Oils. Fits Wrist Sizes 6.5-8. "Metaphysical Properties of Hematite are: A strong Rooting Stone, it is connected with the Root Chakra and Solar Plexus Chakra. Hematite is a protective stone and can help calm you in times of stress or worry."