Lead oxyhalides occur under variety of natural and technological conditions. They can be found as secondary minerals in oxidation zones of mineral deposits. For instance, Merehead quarry in England is the famous place for many findings of lead oxyhalides first described in 1923 by Spencer and Mountain (1923). Genesis of these deposits is still a topic of discussions. The most recent version points out that galena deposits were emplaced into limestones during the Triassic period (Turner 2006). Afterwards, they were locally exposed to the action of seawater. Oxidation of galena initiated deposition of manganate minerals from the seawater as well as adsorption of heavy metals from both seawater and local environment.