Can you spot the difference?

One of the tiles in there is different from the others, can you spot it? I think it is not that hard to tell.

Bought that one tile off the flea market today and I like it! :D

Quizzes are finally over and after this week, I have 2 study weeks before my finals! I can see the holidays nearing~

I hate my nose now because it is so itchy!!! Sneezing non stop... T_T

Saki.