Answer:
What flies forever, Rests never?
At night I come without being fetched. By day I am lost without being stolen.
My first is an insect; my second is a border; my whole puts the face in a tuneful disorder.
I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty.
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
Dry though I may be, I am still a sea.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?