I am made of deposits found on the land, in puddles, in mud, and even in sand. I can form into models as it's what I do, but I can also be used for art projects too.

I cradle giants with iron skin, yet never move, though tides begin. My arms stretch wide, a shelter true, for ships that roam the ocean blue. Though made of stone, I breathe the sea; guess what steadfast place I be?

Up in a wave, down in a snap. Run one or take it, Chosen at a tap.

Every day, you give me a command. Yet every day, you scold me for obeying. What am I?

I can bring great fortune if a rare one is found, but I cannot survive long when out of the ground. People use me to to keep livestock around.