Popularity: 27 percent in 2011 versus 19 percent in 2009
Why Guys Like It: "Younger or less traditional customers often like tungsten for its industrial look," says BlueNile's Josh Holland. Daniel Horning, who works at HireAHelper.com in Boulder City, Nev., got a tungsten carbide wedding band in 2007 because of the durability. "I'm working on DIY projects--gardening, and doing my own car repairs, but to this day there's not a scratch on it," he says.
Drawbacks: It's also difficult to resize.