Granite is a natural stone and some types of granite contain naturally occurring radioactive elements such as uranium, thorium, and radium. However, the levels of radioactivity in most granites are low and generally do not pose a significant health risk.

In addition, the levels of radioactivity can vary greatly depending on the type and location of the granite, and most granites used in residential and commercial applications have been tested and found to have low levels of radioactivity.

It is worth noting that many common building materials, such as concrete and ceramics, also contain low levels of naturally occurring radioactive elements. However, as long as proper safety measures are taken during the production and installation of granite worktops, there is no need for concern about radioactivity.

Granite worktops are not considered to be radioactive on any scale, however. There have been studies conducted and America’s Environmental Protection Agency drew the following conclusion to the question:

While granite and other decorative stone can contain some trace natural radioactivity, granite countertops are not considered to be a key contributor to radiation in the average home.
Radioactive minerals in the granite can decay into radon – a colorless, odorless, radioactive gas – which may be released from the surface of the granite over time. However, since the granite is not porous and exposed surfaces are treated with sealant, it is harder for the radon escape from the granite than from more porous stones such as sandstone.

Are granite countertops radioactive? Are the levels dangerous? | US EPA

There are some types of granite that can be slightly radioactive due to the presence of uranium and thorium. These elements are found naturally in many rocks and minerals and are only considered to be dangerous if they are concentrated in a small area.

Granite is a natural stone that is formed underground by heat and pressure over millions of years. It is made up of different minerals, including quartz, feldspar, and mica. While some of these minerals are slightly radioactive, the overall radioactivity of granite is very low. Therefore, granite worktops are not considered to be a health hazard.

If you are concerned about the radioactivity of your home, we recommend you buy a radon measuring kit (UK) and test it for yourself. These kits are inexpensive and results are verified by approved laboratories, so you can probably trust the results.

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