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Cinnabar has a mean refractive index near 3.2, a hardness between 2.0 and 2.5, and a specific gravity of approximately 8.1. The color and properties derive from a structure that is a hexagonal crystalline lattice belonging to the trigonal crystal system , crystals that sometimes exhibit twinning .
This silica-carbonate rock was mineralized by cinnabar following the hydrothermal alteration of the serpentinite in the rock. Edoylerite is a primary alteration product of cinnabar. Though found with cinnabar, the crystals of edoylerite do not typically exceed 0.5mm in length. The ideal chemical formula for edoylerite is Hg 3 2+ Cr 6+ O 4 S 2 [2]
A Chinese "cinnabar red" carved lacquer box from the Qing dynasty (1736–1795), National Museum of China, Beijing. Vermilion (sometimes vermillion) [1] is a color family and pigment most often used between antiquity and the 19th century from the powdered mineral cinnabar (a form of mercury sulfide).
The bright scarlet color, vermilion, was made by pulverizing the mineral cinnabar. A synthetic Vermilion was created in the 9th century with a compound of mercury and sulfur . century, with a mixture of the great majority of red pigments are made artificially, rather than taken from nature.
red cinnabar (α-HgS, trigonal, hP6, P3221) is the form in which mercury is most commonly found in nature. Cinnabar has rhombohedral crystal system. Crystals of red are optically active. This is caused by the Hg-S helices in the structure. [5] black metacinnabar (β-HgS) is less common in nature and adopts the zinc blende crystal structure (T 2 ...
Differences in chemical composition and crystal structure distinguish the various species. Within a mineral species there may be variation in physical properties or minor amounts of impurities that are recognized by mineralogists or wider society as a mineral variety. Mineral variety names are listed after the valid minerals for each letter.
Cinnabar dots as seen on an ancient dzi. Some dzi beads exhibit what are referred to as "blood spots", which are tiny red dots in the white areas, indicative of iron content. This is a highly desirable characteristic among collectors, but relatively rare.
1 Composition. 2 Structure. Toggle Structure subsection. ... Amounts of realgar, stibnite, cinnabar and pyrite are contained in sediments near active hot springs.
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