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This is a reflected light micrograph of a polished, carbon coated cinnabar crystal. The identifying etched label, which is a feature of our standards, is invaluable for navigating in an electron beam instrument. This is the only naturally occurring
compound of mercury. Because mercury is a liquid at normal temperatures the pure element cannot easily be used as a standard, so cinnabar is valuable in this respect. It is a brilliant red color.
Locality: Nikitovka Mine, Ukraine
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