· Tungsten Rings are the most wear-resistant pendants available on the planet. · Tungsten is about 10 times harder than 18K Gold, 5 times harder than tool steel, and 4 times harder than titanium. Tungsten measures between 8 and 9 on the Mohs hardness scale. (Diamonds are a 10 - the highest.) · Due to their extreme hardness, Tungsten Rings will hold their shape and shine longer than any ring on the market. · Tungsten Rings have been referred to as "Permanently Polished Rings." · Tungsten Rings will NOT bend. · In the event of an emergency, a ring can be removed by a medical professional. · Each Tungsten Rings is individually hand-crafted using assorted diamond abrasives and polycrystalline diamond tooling