'Flint' in the Bible

Then Zipporah took a flint, and cut off the foreskin of her son, and cast it at his feet; and she said, Surely a bridegroom of blood art thou to me.

who led thee through the great and terrible wilderness, wherein were fiery serpents and scorpions, and thirsty ground where was no water; who brought thee forth water out of the rock of flint;

At that time Jehovah said unto Joshua, Make thee knives of flint, and circumcise again the children of Israel the second time.

Who turned the rock into a pool of water, The flint into a fountain of waters.

whose arrows are sharp, and all their bows bent; their horses hoofs shall be accounted as flint, and their wheels as a whirlwind:

For the Lord Jehovah will help me; therefore have I not been confounded: therefore have I set my face like a flint, and I know that I shall not be put to shame.

As an adamant harder than flint have I made thy forehead: fear them not, neither be dismayed at their looks, though they are a rebellious house.