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Yes, limestone often turns yellow over time when improperly cared for. The stone contains natural iron deposits, which can oxidize when exposed to water, acids, or harsh chemicals, such as bleach. Without exposure to water or chemicals, limestone should not turn yellow. Always seal limestone countertops to protect them from moisture, and only use gentle cleansers designed for stone.

Always work with licensed and certified masons in your area when installing a stone wall or even a stone veneer. Just like all home designers, they should provide an impressive portfolio and offer a free estimate for the project. Pick the pro who fits your budget and schedule and, most importantly, helps you realize your landscape vision.

Silestone® isn’t recommended for outdoor use because UV rays can damage the surface. Long-term exposure to direct sunlight can cause discoloration. Instead, choose an outdoor-friendly countertop material like tile, concrete, stainless steel, or natural stone. If you do choose a natural stone, make sure you either seal it or avoid highly porous stones. For example, choose soapstone over marble.

You generally cannot change the color of the natural stone, such as making granite countertops darker or lighter. Some people claim that certain chemicals will lighten or darken granite, but those will damage the stone and not provide uniform, expected results, so it’s better not to try. Similarly, some people ask whether they can stain over granite. Granite is beloved for its stain-resistant finish, so you probably won’t get the best outcome if you try to stain over granite to make it darker.

Instead, consider honing, painting, or applying another material over the top of the granite to make it appear darker.