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Some trace of natural radioactivity can be linked with all decorative stone products including granite. Radioactive minerals available in these materials get decayed into a radioactive gas known as radon. Over a period of period of time, this gas is released from the surface to cause heath issues. You don’t need to worry about this radiation when you buy granite countertops from Grifon. Basically, granite is not porous. Additionally, we treat the exposed surfaces with sealant to make it difficult for the radon to escape from the granite.