scratch on ceramic case?!

so..One of the reasons choosing a ceramic case is because they are considered scratch-proof...apparently not, got a nice white scratch on my black case. Was hoping it would be some material which could be rubbed off..unfortunately not. Guess I'll be heading to the shop, but to check with you, even though scratch-proof this presumably is no warranty?

sry - was a bit too quick, found a post involving an ink eraser...going to try!

I would say scratch resistant. I am not aware of any claims of "scratch-proof", where have you seen this documented?

Well, the first ceramic cases from the 90s were made of zirconia. Ths hardness is similar to sapphire glass.

Sure, the hardness is only one parameter for scratch resistance, but an importent one.

Zirconia Mohs hardness = 7-9

Sapphire glass Mohs hardness = 9

I have seen some scratched sapphire glasses and so I do not believe that ceramic will be scratch resistent ?!

My ref. 3705 ceramic has no scratches yet, but some grinding characteristics.

I think whether Ceramic is "scratch-proof" or "scratch-resistant" is not very important.

The fact is even if the ceramic casing is indeed "scratched," I don't think it will be very visible at all by the naked eyes.

What most people think about ceramic cases having scratches is the situation similiar to that of the original poster of the thread--they see a colored mark on their ceramic case. In most cases, these colors can be wiped off... think about it, ceramic casing isn't just a lay of coating like PVD... the entire casing is made of the same ceramic material. How can one "peel" off the surface and expose a different color from underneath? this must be traces of paint or metal from the other substances left on the ceramic casing... hence, something that can be wiped off.