The composition of white lead ore is lead carbonate, which is sometimes partially replaced by silver or chromium. It belongs to the carbonate, aragonite group, and orthorhombic crystal system, and reacts with dilute acid to produce carbon dioxide bubbles, containing 77.6% Pb. The crystal is in the form of a plate-like or pseudo hexagonal bipyramidal shape, and it is common to run through twin crystals. Generally, it is a dense block like aggregate, bell like emulsion, or soil like structure. White or light yellow, brown, and other colors. Diamond luster. Hardness of 3-3.5, density of 6.4-6.6. Bubbling when encountering hydrochloric acid. It is a secondary mineral of galena that has been oxidized on the surface. Usually used together with galena to extract lead or prepare various lead compounds