Ceramic-case watches
References in the Grail Atlas catalog with a ceramic case.
Modern ceramic watch cases are zirconium-oxide based, sintered at high temperature, then diamond-machined to final shape. The material is harder than steel (Vickers hardness ~1200 vs steel's ~200), effectively scratch-proof to anything short of a diamond, light, and dimensionally stable. The trade is brittleness: ceramic does not bend, it shatters. A drop on tile that would dent a steel case can crack a ceramic one.
What to look for
The Rado Ceramica line was the first commercial ceramic watch case (1986) and Rado still leads the category at the entry tier. At the luxury end, the IWC Top Gun Pilot's Watch series uses ceramic for the case, the Omega Speedmaster Dark Side of the Moon uses it for case and bracelet, and the Hublot Big Bang Unico Black Magic does ceramic across the entire watch. Audemars Piguet's Royal Oak Perpetual Calendar 26579CB (black ceramic case and bracelet) is the integrated-bracelet expression that proved ceramic can carry the entire watch. Colour stability is the long-term question: black and white ceramics hold up well, coloured ceramics (Hublot's range) are newer and the multi-decade behavior is not yet known.
