Introduction to the Sky Stone: The Sky Stone comes from the story of Nuwa holding a stone to mend the sky. It is said that after Empress Nuwa repaired the sky, she was worried that it would collapse. Then a big turtle swam up and offered his leg. Nuwa was so sorry that she tore off her clothes and gave them to the turtle. From then on, the turtle no longer used its legs but its fins to swim. Nuwa used the four legs of the turtle to make the sky stone.