“Rock color” mainly refers to the colored particles of rocks. It includes colored sandstone, colored minerals, colored earth, and synthetic materials that have the material properties and aesthetic characteristics of rocks.
Rock color can be used as a pigment for painting, but it is not just a pigment for painting, it is the basic material of the earth.
Loess Plateau 
Danxia landform of Wuyi Mountain 
Zhangye colorful Danxia 
Tianshan Grand Canyon
Azurite 
turquoise 
chalcopyrite 
lazurite 
orpiment 
cinnabar 
tourmaline 
Loess
Green soil 
laterite 
Purple Soil 
Chengpan earth