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To remove cloudiness from marble, use equal parts baking soda and water to form a paste. Apply it to the surface, allow it to sit for at least two hours, then wipe with a microfiber cloth. Another option is adding a couple of dish soap drops to warm water and wiping the surface after you’ve applied it to the surface. You may also consider using a liquid stone cleaner.

While quartz is highly stain-resistant, it is not completely stain-proof. Spills, including water, should be wiped up as soon as possible to prevent staining. Minor stains are usually not permanent and can be removed using a quartz-safe cleaner, a simple mixture of dish soap and water, or a baking soda paste applied with a soft microfiber cloth. For severe stains that persist, professional treatment may be necessary, and in rare cases, countertop repair or replacement might be required.

Quartzite countertops are porous, meaning that liquids can seep into the stone and stain them. You’ll need to seal them before installing and resealing annually, depending on use and stone material. Sealing will help prevent stains and etching. On the other hand, you don’t need to seal quartz and other engineered stone countertops since they aren’t porous.

Like most stones, limestone should be sealed. Its porous nature makes it prone to staining from spills, and the iron in the stone can cause it to turn yellow when exposed to moisture or harsh chemicals. Proper sealing can help prevent these problems and protect the stone's appearance.