Answer:
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.
I work when I play and play when I work.
What is often returned, but never borrowed/
You can spin, wheel and twist, but this thing can turn without moving. What is it?
It is an arctic double breasted formal wear.
Lynn likes grapes but not potatoes. She likes squash but not lettuce, and she likes peas but not onions. Following the same rule, will she like pumpkins or apples?