We’re basically softies. But when it comes to watch cases, we want them to be as hard as possible. Rado developed high-tech ceramics in the mid-1980s and worked with its predecessor Hardmetal already in 1962, for the iconic Diastar watch. Hardmetal was made by compressing tungsten-carbide powder at 1,000 bar and heating the result at a temperature of 1,450 degrees. High-tech ceramics were made of zirconium-oxide or titaniumcarbide-oxide that is injection-moulded into shape and then heated to the same 1,450 degrees. Here are a few options if you’re looking for a ceramic watch.