Cinnabar Cinnabar Cinnabar () and cinnabarite (), likely deriving from the ("kinnabari"), refer to the common bright scarlet to brick-red form of mercury(II) sulfide (HgS) that 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 generally occurs as a vein-filling mineral associated with recent volcanic activity and alkaline hot springs. The mineral resembles quartz in symmetry and in its exhibiting birefringence; cinnabar has a mean refractive index of approximately 3.2, a hardness between 2.0 and 2.5, and a specific gravity
Kudremukh Iron Ore Company December 2001. Kudremukh area is a biodiversity hotspot, with Kudremukh national park nearby. The mining lease was temporarily extended, however, it was completely stopped in 2006 due to environmental reasons. In 2016 KIOCL planned to develop a commercial resort in the Kudremukh national park, refurbishing some of its buildings, unused since the closure of the mine. The project had not obtained an environmental clearance. In October 2016 the Ministry of Environment and Forests ordered to immediately stop the work. Kudremukh Iron Ore Company KIOCL Limited, formerly Kudremukh Iron Ore Company Limited is a Government of India enterprise with its head