Pseudomorphous turquoise was discovered by the author in Maanshan area. Though similar to nodular and veinlet turquoise in many mineralogical and ore deposit characteristics, pseudomorphous turquoise preserves the crystal form of apatite, with its ore-forming parent rock being apatite-magzietite- actinolite dikes.The formation of pseudomorphous truquoise requires specific geological conditions such as rock, geological structure, wall rock(parent rock) alteration and surface oxidation，and therefore this mineral is rarely seen in the world.