What's the use of cucurbits mending stones?

Huluwa's sky-mending stone should be composed of malachite, colorful stone, diamond stone and nuwa stone, and then the powerful mountain god grandpa can be summoned.

There is a figure between heaven and earth, with a snake head. Everyone calls it Nuwa, and she still has a stone in her hand called Tian Tianshi. The stone worshipped by the snake spirit is probably Tian Tianshi, and the snake spirit should be Nu Wa.