Natural stone veneer cladding is mined from natural rock mass and processed into blocks or slabs.
Marble and granite are the two most commonly used. Marble is a metamorphic carbonate rock formed by the original rock in the crust through crustal deposition or high temperature and high pressure. The main component is calcium carbonate, accounting for more than 50%. Because marble generally contains impurities, such as large crystal particles, it is brittle, and calcium carbonate is easily weathered and corroded by the action of carbon dioxide, carbide, and water vapor in the atmosphere, making the surface tarnished. Of course, you don't need to pay attention to this, because this geological age is calculated in billions, and in our lifetime, this qualitative change is limited.
Granite is a rock formed by the condensation and crystallization of underground magma or volcanic erupted lava. Its composition is mainly silica. When the content is more than 65%, it is an acid rock. This kind of rock is composed of feldspar, quartz and mica. Crystals formed by other basic minerals have a granular structure, and the rock is hard and dense. Therefore, granite is mostly used outdoors and in harsh environments.
The natural stone veneer cladding sold in the world today are not so meticulously divided. Most of the textured carbon fossils are generally referred to as marble, while the speckled crystalline particles are generally referred to as granite. Of course, it is not necessary to carry out such detailed classification for interior decoration.
There are also radioactive substances to be mentioned in natural stone. You can rest assured on this point. Natural stone contains radioactive elements like any substance, but the content is very low, and it does not reach the level of harm to human beings. At present, there is only a clear definition of the radiation intensity of granite on the market, which is divided into three categories: A, B, and C. Most of the stone veneer cladding have reached the standard of category A.
