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
Cinnabar Theater of Figaro" (2014), and others. Notable among the many dramatic works produced at Cinnabar was a 2004 production of Tony Kushner's "The Illusion" (1988) adapted from "L’Illusion Comique" by 17th-century French playwright Pierre Corneille. The Cinnabar production featured actor Jeffrey Weissman. In 2013, Broadway veteran and film/television actor Charles Siebert played the role of Gregory Solomon in the Cinnabar production of Arthur Miller's "The Price." Cinnabar Theater The Cinnabar Theater, located in Petaluma, California, is a professional non-profit theater producing opera and musical theatre, drama and a chamber music series in a 120-seat venue, under the auspices of the Cinnabar