Answer:
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.
The higher I climb, the hotter I engage. I cannot escape from my crystal cage.
A caribbean shape that makes ships disappear
What comes once in a minute, twice in a moment, but never in a thousand years?
What is it that was given to you, belongs only to you. And yet your friends use it more than you do?
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.