New Almaden hydrothermal deposition of cinnabar from deep within the earth is found in a gangue of silica-carbonate rock formed locally by hydrothermal alteration of serpentine. The Guadalupe mine produced about 10% as much mercury as the New Almaden. There are several smaller mines in the mining district, but their ore production was not significant. The only significant quicksilver ore is cinnabar; other sulfides are present in small quantities. Mining, other than a single placer deposit of cinnabar, was underground. There is a high probability of undiscovered high-grade ore which could be found and exploited using modern techniques. Mining operations resulted in
Ore Valley Clifton Road Methodist church and a Salvation Army unit. In the part of Ore known as St Helens stands a second Anglican church dedicated to St Helen. The church was built in 1868, and its predecessor, an ancient church dating from the reign of Edward III, now stands in ruins nearby. Hastings Cemetery is in the St Helens area of Ore. Ore Valley has the Ore Valley Campus of Sussex Coast College Hastings on Parker Road. Hastings Academy is in the nearby Red Lake district of Ore. Primary schools: Secondary schools: Ore Valley Ore, a former village, is still known