That is something I'm pritty good at, I guess I do it sometimes subconsciously. I originally thought it was me just been picky ha.
It's tricky though because if a girl is wearing a bracelet then she obviously likes it so either she bought it or someone close to her bought it as a present. Do you see what I'm getting at? That person might be so important to her that it would be a negative thing to talk about if you wanted to build attraction.
It happened to me with a girl that had a frog watch on a few weeks ago.

Of course, that is possibly thinking about it too much ha!