How to distinguish terrazzo and marble
Terrazzo surface is rough, marble surface is very smooth. I don't know which radioactivity is big.
Terrazzo is cement and gravel mixing and pouring into the ground, there are about 1 square meters of dividing line, glass or copper strip dividing line, and then polished after waxing, marble is native to Yunnan Dali stone, now rarely used. The size of radioactive material radioactive terrazzo stone have the general to be tested to know.
