Exclusive Design Salt of the Earth Pewter Key Chain. Coin is 1 1/4 inches in diameter connected to a 1 1/2 inch chain. Coin features a piece of salt in epoxy coating in the center and depictions of people holding hands on the outside. Text on front - You are the salt of the Earth, and the reverse reads - You are the Light of the World. Both lines are reference to the Bible verse of Matthew 5:13-16 NIV. by Sterling Gifts. Jesus was very clear that we are to be the salt and light of the world.