How to get rust out of stone countertop

Blot the rust stain with cool water, then try baking soda gently; rust on stone may need a commercial product made for this, used per its label.

1. Blot the stained area with a clean cloth dampened with cool water.
2. Sprinkle a small amount of baking soda on the damp stain.
3. Press a damp clean cloth over the baking soda; do not rub.
4. Blot up the baking soda with a clean cloth dampened with cool water.
5. Blot the area dry with a clean cloth.
6. Repeat once only if the stain is lighter and the surface is not dulled.