Obsidian stone with a black copper wire. The strand is adorned with natural stones, crystals, and spcicialized beads.Obsidian is volcanic glass, an igneous rock. It is rich in the lighter elements such a silicon, oxygen, aluminum, sodium, and potassium.Obsidian is truth-enhancing. It is a strong protective stone and will shield against negativity. This stone will draw out stress and reduce tension.Obsidian, glass beads, specialty beads, metal, wire, copper wire. The materials are all natural and will do well in an outside environment.