AYRT (I think, sometimes the way dreamwidth does comments confuses me)

I completely agree.

Gravel is way too fine, and the salt doesn't really look like crystals of salt, but sand.

But, as you said, I will likely never pay attention to these items and don't really care about them. I just wish that they had made gravel and salt a bit more distinctive, regardless of whether they are meant to be 'paired' with sand.