mi nombre es quijarros o guijarros?

[quijarros]

Como se dices ' pebbles ' ?

[Tomisimo]

To be honest, I've never heard "guijarro" used by a native speaker (Mexican). My dictionary does have it though, so it must be so. I'd say "piedritas", I think it'd be a lot more common. But yes, the word is with G not Q. Would you like me to change your username?

[sosia]

It's guijarros, like Tomisimo says. It's very common in Spain. Its usually a little stone who has polish surface ( usually was eroded by water ). Guijarro, plural guijarros.

[Tomisimo]

And once again we see striking differences in the Spanish from Spain and from Latin America. Very interesting.