Specific gravity: 8.1
Hardness: 2 2½
Solubility: Insoluble in hydrochloric acid, sulphuric and nitric acid
Fumeroles and hot spring deposits
Cinnabar occurs in the oxidation zone of epithermal (low temperature) hydrothermal veins, at fumeroles, and also in hot springs.
It may be associated with
stibnite, and sulphides of copper.
Cinnabar is the most important ore of mercury but is found in quantity at comparatively few locations.
At the Rutland Cavern, Heights of Abraham, Matlock Bath, Derbyshire, England, UK, cinnabar has been found associated with smithsonite, and as minute specks dusting the surface of both smithsonite and fluorite (RES p51).
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