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2. Cinnabar - Wikipedia

   en.wikipedia.org/wiki/Cinnabar

   Cinnabar generally occurs as a vein-filling mineral associated with volcanic activity and alkaline hot springs. The mineral resembles quartz in symmetry and it exhibits birefringence. 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.

3. Wakasugiyama Site - Wikipedia

   en.wikipedia.org/wiki/Wakasugiyama_Site

   Cinnabar, the raw material for vermilion, is found in crystalline form in exposed quartz veins the limestone and chert slopes on the west side of the Wakasugitani River, which is a tributary of the Naka River that flows eastward through southern Tokushima Prefecture.

4. Hexagonal crystal family - Wikipedia

   en.wikipedia.org/wiki/Hexagonal_crystal_family

   In particular, there are crystals that have trigonal symmetry but belong to the hexagonal lattice (such as α-quartz). The hexagonal crystal family consists of the 12 point groups such that at least one of their space groups has the hexagonal lattice as underlying lattice, and is the union of the hexagonal crystal system and the trigonal ...

5. Mercury sulfide - Wikipedia

   en.wikipedia.org/wiki/Mercury_sulfide

   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 ...

6. Cold-Food Powder - Wikipedia

   en.wikipedia.org/wiki/Cold-Food_Powder

   Cinnabar (mercury sulfide), quartz (silicon dioxide), and dolomite crystals (calcium magnesium carbonate) from Hunan, China Orpiment (arsenic sulfide) from China Prepared realgar (arsenic sulphide) The precise components of hanshisan or wushisan are uncertain. Sailey describes the difficulties in identifying the ingredients.

7. File:Cinnabar, quartz, dolomite 2.jpg - Wikipedia

   en.wikipedia.org/wiki/File:Cinnabar,_quartz...

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