M.J. Hibbard

Cinnabar

Cinnabar   HgS    Hexagonal-rhombohedral
o Low-temperature (epithermal) hydrothermal environment. (chapter 12)
- Marcarsite-hosted cinnabar-quartz vein is 1-2 cm thick. Note bilateral zoned symmetry of vein filling characterized by early precipitation of microcrystalline cinnabar (red) followed inward by quartz (white). The vuggy medial region in quartz (left) indicates a low-pressure (open space) environment. Castle Peak Mine, Virginia Range, Nevada. Keck Museum/MSM.

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