The cinnabar in Zhangjiajie is strictly inspected by the quality inspection department. Cinnabar, also known as ghost fairy cinnabar, cinnabar, red lead and mercury sand, is a kind of mercury sulfide (HgS) mineral with a mercury content of 86.2%. Its crystal can be used as an important material for laser technology. China used it as an important raw material for alchemy in ancient times, and it was named after the best quality of Chenzhou (Yuanling, Hunan).

The crystal belongs to the tripartite system and is homogeneous with the black Cinnabar of the equiaxed system. It is usually a diamond or a short column. It usually runs through twins and has a perfect cleavage of parallel cylinders. The aggregate is granular, blocky or film-like, with Mohs hardness of 2.5 and specific gravity of 8. 10. The color is often red, and the crystal surface has red stripes and is translucent. Pure cinnabar is diamond luster and vermilion.

The identification method of cinnabar is as follows:

1, look at the color.

Judging the authenticity of cinnabar by color, the real cinnabar is pure and natural in color, with obvious streaks on the surface, mainly red or dark red, which looks brighter, while the fake cinnabar is brighter without streaks, giving people an unnatural feeling.

2, look at the luster.

Distinguished by luster, natural cinnabar has metallic luster, fine texture, odorless and tasteless. If the quality is good, it will feel more obvious, giving people a feeling of lubrication and softness. The fake has a dull surface, rough texture and poor hand feel.

3. Marking method.

Distinguished by marking method, natural cinnabar is made without any chemical treatment. Take a small piece and put it on the white paper for a few strokes, and you can see that there are obvious red stripes on the white paper, while most of the fakes are dyed and have not changed after marking.