《汉书·传·司马相如传上》
大地土壤有朱红、石青、赤土、白土、雄黄、石灰、锡、碧玉、金、银，五颜六色光彩炫耀照人，色彩相杂互相交错，好像龙鳞泛光相杂。
其土则丹青赭垩，雌黄白坿，锡碧金银，众色炫耀，照烂龙鳞。
The soil is red and blue, vermillion and white, orpiment and lime, tin and jasper, gold and silver, and all the five colours are displayed together, making a beautiful and dazzling sight, like the scales of a dragon. 