Changhua Tianhuang Stone from Yuyan mountain area of Changhua in Zhejiang Province is a new species of Tianhuang Stone. Mineralogical studies of 68 samples show that Changhua Tianhuang Stone is composed of dickite and kaolinite, and may contain such auxiliary minerals as quartz, alunite, sericite, limonite and pyrite, but with no nacrite. Changhua Tianhuang Stone formed under the geological conditions similar to those of Shoushan Tianhuang Stone, and has such identification characteristics of Tianhuang Stone as surface, shape, color, texture, radish lines and red crack. Changhua Tianhuang Stone is different from Shoushan Tianhuang Stone in mode of occurrence, size, shape, and mineral components.