So, it would help to consider the situation that she held it in and the body language she showed.
She plays with her jewelry.
Whereas, if she only seems to do it with you and she shows different body language around you compared to around her friends then it would be more likely that she was showing attraction.
Today we rarely see a horse on the street, but this introduction is not about horses but the point is that we should not attract attention of others neither with attitude, nor with clothes or appearance.
She ditches friends to hang out with you.
However, she could also have been showing attraction.