My Giorgio Armani e/s closure broke without me remembering actually dropping it... so I can't close it anymore, but the e/s doesn't crumble or anything (thank god, it's the e/s that I carry with me all the time, the color is so versatile as well as the tiny mirror)
I dropped my Chanel Double Perfection Compact once. Lid broke off, I now have a seperate mirror and the part where make up and sponge are... but I bought a new compact though, DP is very convenient
I dropped my Guerlain Terracotta Bronzing Powder Compact several times, but this one has never shown any sign of wear in all these years (!) (except for the sticker on the bottom lol)