Black and copper is a terrific combination. Just look at this bracelet and you will agree. The lava stone is electrocoated metallic copper, but it still provides grounding and courage, and will still absorb your favorite essential oils. The agate also offers courage and strength, as well as protection, security, and safety. The copper can amplify the energy transfer from other stones to the wearer. It is also an anti-inflammatory and anti-microbial metal. Add some essential oil and you are good to go.