Is it a Ruby?
-that might be a lie!
though it also looks quite like an eye!
if you guess it’s name
you get 3 black pearls
(and plenty of fame!)
the owner of it wishes to be free,
and I am glad the thing is not owned by me.
above this thing is a red crown,
this hint is useless -but it was found on the way to town.
it used to flutter:
and in doing so it could whack a glass shutter.