The chemical composition of cinnabar is mercury sulfide, and its color is often bright red, vermilion, light red, dark red and streaky red. The crystal belongs to the triangular system, which is plate-shaped or rhombic, and the aggregate is granular or massive. Diamond twin crystals and large-particle single crystals are common in crystal clusters. The surface has diamond luster, glass luster or metallic luster, translucent or opaque; High refractive index, high brittleness and cleavage development; The hardness is Mohs 2-2.5 and the specific gravity is 8.2. Its powder is red and can last for a long time. It was used as a pigment a long time ago. Zhusha stone only occurs in volcanic rocks, hot spring deposits, low-temperature hydrothermal deposits and fault breccia dolomite caves, and often coexists with Yingshi, Realgar, orpiment, calcite, stibnite, pyrite and albite.
1June, 980, a huge crystal cinnabar was collected in Yanwuping mining area, Wanshan, Guizhou. The crystal is 6.54 cm long, 3.5 cm wide, 3.7 cm high and has a net weight of 237 grams. It is pure and flawless, bright red in color and complete in crystal form. The bedrock on one side is dolomite crystal clusters, which are red and white, colorful and magnificent. It is a rare treasure in cinnabar.