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White quartz countertops can yellow over time if exposed to sunlight. To prevent this, avoid installing white or light-colored quartz countertops in a kitchen with a lot of natural light, and never install quartz in an outdoor kitchen.

In most cases, chipped or cracked granite can be salvaged, but it depends on the size and scope of the damage. For example, a pro can smooth out small chips on the edge with polish pads or an angle grinder, but a crack that runs through the stone's surface has little-to-no chance of being fixed easily.

Acid can seriously damage granite countertops and lead to etching and erosion. This is why cleaning with vinegar isn’t recommended. Other acidic items that you should keep away from your granite countertops include:

• Citrus

• Acetone nail polish remover

• Tomatoes

• Ammonia

In addition, always steer clear of using bleach on or around your granite as it will degrade the countertop’s sealant quickly.

A water-based, low- or no-VOC sealer is typically a good choice for marble countertops. Choose a sealant that is certified safe for contact with food when applying to kitchen countertops. For high-traffic areas, look for formulas that have heat-resistant and acid-resistant features. While there are economical and convenient spray-on sealers, they don’t coat the surface as effectively as the ones you apply with a pad or brush.