There are several steps to remove coffee stains from quartzite kitchen counters:

1. Blot the spilled coffee or coffee stain with a clean cloth or paper towel to remove as much of the liquid or stain as possible. Do not rub the stain as this can push the stain further into the counters.

2. Mix a solution of warm water and dish soap in a small bowl.

3. Dip a clean cloth or sponge into the solution and gently scrub the coffee stain, starting from the outer edges and working inward. Do not use abrasive pads or scouring powder, as these can damage the quartzite surface.

4. Rinse the area thoroughly with clean water and wipe dry with a clean cloth.

5. If the coffee stain persists, mix a paste of baking soda and water and spread it over the stain. Leave the paste on the stain for 10-15 minutes, then scrub gently with a soft-bristled brush. Rinse with clean water and dry with a clean cloth.

6. For stubborn stains, you can try using a commercial stone cleaner or a mixture of equal parts water and white vinegar. Apply the cleaner to the stain and let it sit for a few minutes before scrubbing gently and rinsing with clean water.

7. To prevent future coffee stains, wipe up spills immediately and use coasters for your coffee cups and mugs.