Sterling Silver Black Obsidian & Malachite Ring for Men Octagonal 3 Stripes Solid Back Handmade, sizes 9 - 13 Natural Malachite Stone with Beautiful Color and Depth Malachite is a protection stone, absorbing negative energies and pollutants from the atmosphere and from the body. It guards against radiation of all kinds, clears electromagnetic pollution and heals earth energies All Handmade Ring with Excellent Workmanship and well finished All Solid Polished Sterling Silver with Solid Back and Very Hefty Men's Ring Obsidian is Volcanic Glass and a Natural Material