Leadhillite is a mineral consisting of basic lead carbonate that is commonly found in lead and zinc mines. This mineral is often associated with other minerals such as cerussite, anglesite, and smithsonite. The word 'leadhillite' may also be spelled 'leadhillonite'. There are several synonyms for leadhillite including plumbonacrite, cerussite spar, plumbojarosite, and leadhillionite. Some of these names refer to the color of the mineral, while others relate to the location where they are commonly found. Despite their different names, all of these minerals are primarily composed of lead and have similar physical and chemical properties.