Stone is contaminated by organic matter will make the contaminated parts of the color deepened, long-term does not fade, adsorption dust. Organic pollutants are mainly derived from oily and animal contact, especially where humans are often touched by hand, and are more susceptible to such contamination. In fact, often in the most conspicuous place, decorative stone the most delicate place, is also the most intimate place of human contact. such as stair handrails, the general use of special-shaped high-grade marble decoration. The most unsuitable is the use of white marble sculpture in public places as decoration, this material in such an environment after the pollution of the situation imaginable.