On May 6, 20 16, a seminar on naming scheme of national standard of Seasonal Jade Classification was held in Shanghai. The naming standard of seasonal jade is unified throughout the country, and Nanhong officially becomes an independent variety and is listed in the national standard jewelry and jade name.

Generally speaking, gems are made of natural single crystal minerals, that is to say, a gem is usually made of single crystal, and the crystal is visible to our naked eyes (so it is also called crystal).

Gemstones are usually transparent. After a series of reflections and refractions, the light enters the cut gemstone, and we can see the flash of gemstones, such as rubies, sapphires and emeralds.

There are also a few gems that are natural single mineral aggregates, such as opal and lapis lazuli.

There are also some organic substances, such as amber, pearls, corals, ivory, etc., which are also included in the broad sense of gems. They are also called biological gems.

The concept of jade is composed of countless tiny crystals that we can't see with the naked eye. Its structure can only be seen clearly under a high-power electron microscope, so people call jade an aphanitic mineral. Broadly speaking, the aggregate of these tiny crystals can be called jade.

Let's take a look at Nanhong:

It belongs to an igneous rock structure. In this structure, the mineral crystal particles are so small that they can't be distinguished by naked eyes, and can only be seen under a microscope. The finest particles can't even be distinguished by a microscope, but only react with light. Rocks with cryptocrystalline texture are called "aphanitic rocks".

igneous rock

Mineralogy, where mineral crystal particles can be distinguished by ordinary magnifying glass, is called microcrystal; What cannot be distinguished is called aphanitic. This shows that Nanhong is delicate and dense. When you get a piece of south red, there will be a general frame corresponding to its visual senses.

Cryptotactite: chalcedony

Chemical formula: silica is widely distributed in nature, and forms rocks like other minerals (the main component of sand is silica). There are two kinds of crystalline silica and amorphous silica in nature.

The main component of sand is silicon dioxide.

Crystalline silica can be divided into Synchrone, tridymite and Shi Ying due to its different crystal structures. The chemical properties are relatively stable.

Simply put, Nanhong is a timely mineral, that is, a transparent or translucent aphanitic mineral aggregate containing silica under geological action, which cannot be distinguished by naked eyes, and its silica content is as high as 95%. It contains iron, sodium and other mineral components, and the main red element iron ion in Nanhong mostly exists in the form of hematite.

So Nanhong is called jade.

Second, the color-causing factors of gemstones:

1: chemical factor (it can be the main element or the secondary element in the contained components. Metal elements belonging to the transition group in chemistry. There are eight metallic elements, such as titanium, vanadium, chromium, manganese, iron, cobalt, nickel and copper. ) Most gemstones colored by chemical factors are transparent and brightly colored.

2. Physical factors (interference, diffraction, scattering. ) Gemstones colored by physical factors are mostly gems with special optical effects.

Nanhong is colored by impurities, and the main coloring element in Nanhong is iron ion. Its color forms mainly include hematite, goethite, lepidolite and other trace mineral components. There are different color changes according to the amount of different components of minerals.

The beauty of Nanhong lies in its unique red color, which is very close to the national color of China. Natural red jade is very rare.

In the traditional jade line, the color naming has always been based on the color of natural plants.

For example, "persimmon red" is replaced by a more popular one, which is the same color as persimmon. Because it is to describe it. This is a sensing range, and it is impossible to locate accurately. So color is the most complicated and confusing. (Because the value of Nanhong is most reflected in the color "red". )

Various red names of Nanhong describe the richness of color changes of Nanhong. Note: It is to mark the difference, not to standardize its color. So don't limit yourself to cognition. If it's true, it's putting the cart before the horse.

South red color: here refers to the quantity, which is the most common.

"Thousands of agates and thousands of jade" is to describe the various colors. Including jewelry and semi-jewelry. In color, the standard of measuring value is unified, so it is universal.

We can use the formula of "positive, positive, strong and harmonious" to judge the color of jadeite.

Positive, that is, the color is not doped with other pigments, and the tone is pure without deviation.

Yang, that is, there are no mixed elements in the color that affect its bright and bright color.

Thick, that is, the saturation of color, requires richness and transparency.

And color uniformity, requiring uniform distribution and no color transition.

However, any kind of jade, in terms of color, the more it can meet the above four points, the higher its value. On the contrary, the less conditions are met, the lower its value is.

Why when Nanhong first came out, the color was empty and the fleshy (with a strong harmony) was more expensive. That's the reason.

How to distinguish and judge the different colors of Nanhong?

You'll know the difference between jinhong and persimmon red when you apply it:

Jin Hong (positive, positive, strong, positive)

Persimmon red (lacking, yang having, strong having, having)

Knowing the quantitative standard of color, it will become clearer and clearer in the positioning and value judgment of Nanhong color. It is like a tool, which can only be mastered and familiar after being understood, and can be better used by us.