Quality white marble stone in the construction process, there is a big difference, especially in the economic difference is even greater, with 10 to 20 times the difference, a big difference in that, in order to promote popular science knowledge, so that more people will understand the familiar white marble , I am in the second half of 2005, in Beijing "Popular Science caravans" columns to the white marble recorded a knowledge and identification Kejiaopan, the film will be February 19, 2006 broadcast, please watch.