This is why...Sapphire blades: Zafirro says that the Iridium is the worlds first razor with sapphire blades. The [solid-white] sapphire is made from a single crystal with a finer tip than steel, says Mr. Hamilton. We looked at advanced ceramics as well, but the tip was too big. The sapphire blade is about 80 atoms wide considerably thinner than a human hair.
Iridium handles: The handle of the blade is made from stainless steel and iridium, but Mr. Hamilton says that the bit that makes up the handles skeleton is produced from the rare metal.
Its 10 times rarer than platinum and made mainly from meteorites, he says. Its the strongest functional metal and has been used for making rocket models for the last 50 years.