Cinnabar is a traditional Chinese medicinal material, known as "the medicine of resurrection" in traditional Chinese medicine, and is a good medicine for calming the heart and calming the nerves, invigorating blood circulation and removing blood stasis, and dispelling wind and shock. However, there is a crystal cinnabar produced from chemical raw materials on the market, which is very similar in appearance to natural cinnabar, which is cheap, but also brings serious safety hazards.How to distinguish the real from the fake?We will elaborate on the following aspects:
The color of crystalline cinnabar is no different from natural cinnabar to the naked eye, but the silica and titanium dioxide contained in it can cause the crystal color to be impure.
From the perspective of chemical composition, silica and titanium dioxide exist in the form of aluminum oxide and titanium oxide in nature, which are mineral raw materials.
Although in nature, there are also parts of silica and titanium dioxide that have a similar color to natural cinnabar, after being abrasive, their internal structure changes, resulting in an impure color.
In addition, there are some crystalline cinnabar produced from chemical raw materials on the market, and its internal structure is not significantly different from natural cinnabar, but because it is not a mineral raw material but a chemical raw material, the internal structure of cinnabar will change during the grinding process.
Therefore, it is clearly different from natural cinnabar in color.
Crystal cinnabar is the crystallization formed by cinnabar during the crystallization process, also known as "sulfur crystal", and the crystals of crystals and natural cinnabar have similarities, but there are also obvious differences.
1. Color:Crystalline cinnabar is mostly brownish-red or dark red, while natural cinnabar is mostly dark red.
2. Appearance:Crystalline cinnabar particles are smaller, irregular lumps or granules, and natural cinnabar particles are larger.
3. Density:Crystalline cinnabar is a bit heavier than natural cinnabar.
4. Hardness:When crystalline cinnabar is subjected to external force, it is easy to crumble into powder.
Natural cinnabar has a higher hardness, and the feel is more comfortable when grinding, such as chemical cinnabar, the temperature generated by friction heat during the grinding process makes the surface of cinnabar rough and uncomfortable to the touchAt the same time, due to the heat generated by friction, the surface of the crystal cinnabar becomes smooth and the feel is poor.
If the hardness is not enough, the following methods can be used to identify:
1. Gently prick the surface of the crystal cinnabar with a fine needle, if there are obvious scratches (needle prick part), it means that the crystal cinnabar is a chemical product;
2. Put the crystal cinnabar on the glass for rubbing, and there is an obvious slippery feeling during the friction process.
The crystal structure of natural cinnabar is clear, the size is uniform, and the particle size is uniform.
The crystal cinnabar produced by chemical raw materials has a loose structure, different sizes, uneven particle size, and irregular granularity.
Identification method: take a little crystal cinnabar powder on the white paper, and leave powder traces after rubbing, which is **;There is no powder trace after rubbing, and it is a crystal cinnabar produced from chemical raw materials.
In terms of composition, the main component of real cinnabar is mercury sulfide, and in addition to mercury sulfide, false cinnabar also contains heavy metal elements such as lead, arsenic, cadmium, etc., and contains a large number of other impurities.
The mercury sulfide in natural cinnabar is a highly toxic substance, and the higher the mercury content, the more toxic it is.
The main component of cinnabar is mercury sulfide, which contains a small amount of arsenic, lead, cadmium and other heavy metal elements and other impurities, of which the content of mercury is about 20% of the total mass.
The content of heavy metal elements in fake cinnabar is significantly higher than that in natural cinnabar.
If the lead content in real cinnabar is 009%~0.08%, while the lead content in false cinnabar is more than 5%.
Comparison of the appearance characteristics of crystal cinnabar and natural cinnabar, the surface of natural cinnabar particles is smooth, and the surface of crystal cinnabar is rough.
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