So, what's the fuss about ceramics, you might ask? Besides the capability to color the material in just about any shade one desires (as showcased by Girard-Perregaux's super-vibrant Laureato in a shade worthy of Ruby Rhod), there's a very practical reason for it.
No matter how tough and resilient a metal might be, it's still prone to getting scratched. Even metals with high atomic numbers like gold and platinum, which develop a beautiful patina over the years – as evident in the case of a platinum wedding ring, narrating more stories with each year of marriage – can be easily scratched. Even materials like steel and titanium, known for their robustness, can sustain scratches.
This susceptibility isn't linked to strength, durability, or the metal's quality, but rather to a unique chemical aspect. Despite steel's reputation for strength, it lacks hardness, relatively speaking.
Interestingly, the enamel protecting your teeth is apparently stronger than standard steel, a piece of trivia that's best left untested. Stainless steel, like the one used in watches designated as 316L and 904L, is considerably harder (thus resistant to scratches), but it still accumulates a few battle scars from the rigors of daily life.
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