mbutala writes "I am getting close to popping the question, and I've been racking my brain for an idea for a cool and unique wedding band. I've been thinking of contacting a company that can (possibly) fabricate a ring from pure Iridium (Ir) or a nearly pure alloy. It is the most corrosion-resistant metal known — it cannot be dissolved in aqua regia like gold or platinum. Iridium is extremely rare on Earth, and the high concentration of it at the K-T boundary in the Earth's crust is what suggests a meteor took out the dinosaurs. I am positive that the symbolism of the permanence of Iridium, the reminder that we are star-stuff, and the fact that the ring would be one-of-a-kind would really strike a chord with my girlfriend. It's a really geeky idea, so I thought I would run it past you all — what do you think? Any other ideas?"