I purchased a tungsten carbide ring from Tungsten World. At first I loved the ring because it had a very pretty shine and a good weight behind it. With only a few months the ring tarnished and turned gray. Completely lost its shine and looked more like a stop sign pole. I called Tungsten World and told them what happened. They then accused me of placing my ring into harsh chemicals and making it tarnish. I felt insulted and what did they think I was doing, dipping my hands into harsh chemical agents??? When I asked them for a lifetime warranty replacement, they told me I needed to pay $50 to use their lifetime warranty replacement. I asked them, "Are you kidding? I can get a brand new one from another website for $50 and their rings probably won't tarnish like yours." I decided not to get ripped off twice. Thanks for your *** ring and stealing my money Tungsten World, I hope you choke on it.