Works like a miracle on any stone surface

I purchased this for my white quartz countertops on a whim and I'm so glad I did. This is truly a miracle product. I have used it to remove stains I can't get off with any other product from quartz, marble and porcelain. Everything easily comes off without damaging the surface. My kitchen counters would look horrible if it wasn't for this product, especially around the sink from washing pots and pans. Truly worth every penny!