Bible Verses About Altars: To be made of earth, or unhewn stone

You shall make an altar of earth unto me, and you shall offer upon it your holocausts and peace offerings, your sheep and oxen, in every place where the memory of my name shall be: I will come to thee, and will bless thee.

And if thou make an altar of stone unto me, thou shalt not build it of hewn stones; for if thou lift up a tool upon it, it shall be defiled.

And thou shalt build there an altar to the Lord thy God, of stones which iron hath not touched,

And of stones not fashioned nor polished: and thou shalt offer upon it holocausts to the Lord thy God: