December 1, 2023

Granite Countertop Darkening: What It Is & How To Fix It

Granite countertops, with their stunning natural patterns and robust durability, have long been a favorite in homes and businesses. However, some homeowners may notice that over time, their once radiant granite begins to darken. Understanding why this happens, how to prevent it, and most importantly, how to fix it, is essential in maintaining the beauty of your granite surfaces. Let’s explore this phenomenon in today’s blog post.

Why Does Granite Darken Over Time?

Granite countertops are renowned for their durability and visual appeal, yet they are not immune to certain changes over time, such as darkening. This phenomenon can be puzzling and sometimes concerning for homeowners. In this section, we'll delve into the primary reasons behind the darkening of granite, shedding light on the natural and environmental factors contributing to this change. Understanding these causes is the first step toward effective prevention and maintenance.

Moisture Absorption

Granite, a naturally porous stone, can absorb liquids, which may darken its appearance. This is particularly true for unsealed or improperly sealed granite, where water or oils penetrate the surface and alter its color.

Prolonged Sun Exposure

Continuous exposure to sunlight can sometimes cause granite to darken, especially in the case of darker stones. UV rays can slowly degrade the sealant and affect the color pigments in the granite.

Chemical Reactions

The use of harsh cleaning agents or acidic substances can alter the chemical composition of the granite’s surface, leading to discoloration or dark spots.

Preventing Darkening of Granite Countertops

While it’s true that granite can darken over time, there are proactive measures you can take to protect and preserve the natural beauty of your stone. Prevention is key when it comes to maintaining the original look of your granite countertops. In this segment, we will explore a range of preventive strategies, from regular sealing to the right choice of cleaning products, that can help minimize the risk of darkening and keep your countertops looking as splendid as the day they were installed.

Regular Sealing

Properly sealing your granite countertops is crucial in preventing moisture absorption. Depending on the usage and type of granite, sealing should be done annually or as needed.

Using the Right Cleaning Products

Avoid using harsh chemicals, acidic cleaners, or abrasive tools. Stick to mild, pH-neutral cleaners specifically designed for granite.

Limit Sun Exposure

While it’s not always practical to limit sunlight, consider using window treatments to reduce direct UV exposure on your countertops, especially in sun-prone areas.

Fixing Darkened Granite Countertops

If you've noticed that your granite countertops have begun to darken, all is not lost. There are effective methods to restore and even reverse this discoloration. In this part of our discussion, we will guide you through various approaches – from home remedies like poultice treatments to professional refinishing options – that can help in rejuvenating darkened granite surfaces. These solutions aim to not only fix the existing issues but also protect the stone from future damage.

Deep Cleaning

Sometimes, a thorough cleaning can help lighten darkened granite. Use a granite-specific cleaner to gently cleanse the surface, removing any surface stains or residues.

Poultice Treatments

For more stubborn stains, a poultice made from baking soda and water can be applied. Spread the paste over the stain, cover with plastic wrap, and leave it for 24-48 hours before cleaning it off. This can help draw out the stain from the granite.


After cleaning, reseal the countertop. This not only helps in restoring the granite’s shine but also prevents future staining and darkening.

Professional Refinishing

In cases where the darkening is extensive, professional refinishing may be necessary. Experts can polish and reseal the granite, restoring its original appearance.

Fox Granite Can Help Maintain the Timeless Beauty of Granite

Granite countertops are prized for their unique beauty and lasting durability. Understanding the causes of darkening and how to address them helps in preserving the aesthetic quality of your granite surfaces. Regular maintenance, proper cleaning, and periodic sealing are key to ensuring that your granite countertops remain as dazzling as the day they were installed.At Fox Granite, we understand the value of your granite countertops and are dedicated to helping you maintain them in pristine condition. Whether you need advice on the right sealant, cleaning products, or professional refinishing services, our team is here to provide you with the best solutions for granite countertops in Austin, San Antonio, and the rest of Central Texas. Keep your granite countertops in top-notch condition and let them continue to add elegance and value to your space. Contact Fox Granite today for a free consultation.

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