For the radioactivity of marble, the experts of the national building materials bureau:In the nature, the natural radioactivity is the objective existence, similarly, the natural stone product also has the radioactivity, the key is to see whether it exceeds the national standard. Marble is formed by the influence of external factors such as high temperature and high pressure. Because of the low levels of radioactivity in the composition of calcite and dolomite, the radioactivity of the marble, which is made up of very low radioactive limestone.Conclusion: the radioactivity of natural marble is very low.
Stone including other building materials have a natural radioactive material, U, Th, K because of environmental natural radioactive nuclides are widely distributed in the US, but the vast majority of radioactive materials are relatively low in people's tolerance range. However, the distribution of radionuclides in nature is very uneven, some stones contain high levels of radioactive material, may cause some harm to the human body. As for the depth and intensity of the color is not necessarily linked, mainly to see the stone containing U, Th, K number, closely related with origin. In general, the possibility of stone tile cement strong radioactive phase of the larger, wood can be ignored. The bedroom is best not to use marble and other stone, if you want to use more decorative stone bedroom, you can measure the intensity of radiation (this is the only way to determine the intensity of radiation).
In fact, most people simply do not understand the report. I made a lifetime of stone, marble to tell you that very little radiation, far less than the market to buy the radiation of the tiles, has been superfluous to talk about the safety of the material. Granite is a little lower than the radiation, it should be said that far below the national standard. Otherwise, the exploitation of stone and ceramic tile workers early. Stone (at home and abroad) is used in large places such as the Gaestgiveriet Hotel and senior residential, the Pope's hall is almost five sides of the marble decoration. Do not listen to those who do not know what the layman said "stone radiation..." Such hearsay. Ignorance leads to fear. By the way, I am in the art of stone mosaic. I feel it is my duty to explain the truth simply. I have been living abroad for many years, and I am sure that food safety and clean water and air are very important
