What am I?

I am white, black, clear.

I am cold and burning to the touch.

I can taiste good and like nothing at all.

I can save your life and take it too, often I turn you blue.

I sometimes turn you pink, red with goosebumped flesh.

I can be thick and thin.

I am dangerous and everywhere.

In and outside your home I lay.

I can be carved and yet I often slip out of your hands.

I float and crack.

I can cover the entire earth.

Can you guess what I am?