Ceramic is extremely hard (albeit brittle). Much more so than concrete (or wood ... | Hacker News

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lilyball on Sept 13, 2012 | parent | context | favorite | on: Give people an iPhone 4S, tell them it's an iPhone...

Ceramic is extremely hard (albeit brittle). Much more so than concrete (or wood flooring, or other common floor surfaces).

rdtsc on Sept 13, 2012 [–]

Fun fact ceramic used in spark plugs for ex. is so hard, a small piece of it thrown against a car window will destroy that window.

Mythbusters clip: http://www.liveleak.com/view?i=a5d_1257946254

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