The Sulphur Bank Mine is located near Clearlake Oaks and Clear Lake in Lake County, California. The 150-acre (0.61 km2) mine became one of the most noted mercury producers in the world.
Diagram showing surface cuts and shafts
Cinnabar, or cinnabarite, also known as mercurblende is the bright scarlet to brick-red form of mercury(II) sulfide (HgS). It is the most common source ore for refining elemental mercury and is the historic source for the brilliant red or scarlet pigment termed vermilion and associated red mercury pigments.
Cinnabar mercury ore from Nevada, United States
Cinnabar crystals of an individual size of one centimeter, on quartz. Almadén (Ciudad Real) Spain. Coll. Museum of the School of Mining Engineers of Madrid
Chinese carved cinnabar lacquerware, late Qing dynasty. Adilnor Collection, Sweden.