Question

Tool of thief, toy of queen. Always used to be unseen. Sign of joy, sign of sorrow. Giving all likeness borrowed. What am I?
Don't look it up !

Answer 1

You're a mask. I know this riddle. :D

Answer 2

It's an mask because an mask hides your face always to be unseen and depending on the mask it could be an sign of sorrow or joy so therefore it is an mask