This necklace is made with a natural black obsidian tower that is wire wrapped in a copper cage. The copper ball chain measures 18 inches in length. 
Copper Healing Properties: 
As a conductor of energy, when used with earthly crystals it intensifies, enhances and channels their properties. Copper is thought to assist the body with repairing tissues, oxygenating the blood, easing arthritis, strengthening the female reproductive system and increasing vitality.
Obsidian Healing Properties:
Black Obsidian Stone is a powerful cleanser of psychic smog created within your aura, and is a strong psychic protection stone. It has powerful metaphysical properties that will shield you against negativity. The energy of these stones may stimulate the gift of prophecy. It's an excellent crystal to use when you have been doing spiritual or healing work, as it has a strong action to ground you to Mother Earth. Is excellent in assisting you to release disharmony that has built up in your day to day life and during work on yourself, including resentment to others, fear, and anger.