Watchmakers use a ceramic material with very fine pores. It’s called zirconia (zirconium oxide, for the chemists reading), and it’s simultaneously hard and resistant to cracking. It also resists changes in temperature and moisture, which is why surgeons often use it in hip-replacement prosthetics. To bolster its strength (and achieve that bright, white color) Apple added alumina, another ceramic. The result is a material that’s pretty much un-scratchable, and, under most circumstances, unbreakable.
Is it impossible to break? No. “But you’ll probably never experience forces that are high enough to cause fracture,” Greer says. That may be true, but at $1,250 it’s best to not test that theory.
I want a white ceramic iPhone, which a white front — Stormtrooper White, if you will.