Jade identification knowledge

Jade, mineralogy called jade. The main producing area is Myanmar. The most important thing about jade is to look at its green color. High-quality jade green and rich, high-quality and transparent, no impurity black spots, no stone flowers, even and beautiful.

First, Burmese jade is also known as jade jade. Due to the high hardness of the jade jade in Myanmar (also known as water species), it is bright and bright. And the good jade color is bright and peaceful, with high preservation and collection value, so it is called "the king of jade". It is loved by many people who love jade and jade. Japan and New Zealand also regard jade as the "national stone" of the country. Because jade jade is produced in Myanmar close to China, and most of the finished products are processed in China, and the Chinese have a special preference for jade jade, Western countries also generally believe that jade is China's "national jade."

Second, the color of Myanmar jade jade. The color of Myanmar jade jade is slightly different due to the different customs of the region. In the jade kingdom of Myanmar, the jadeite is divided into three categories and 12 levels. The domestic jewelry industry has subdivided it into more than 30 grades according to its different colors. In general, the color tone of Burmese jade can be roughly divided into the following six types.

1, white. Basically free of other impurity elements

2, red. Containing chemical element iron <Fc3+> <commonly known as ç¿¡>

3. Green. Containing more than 2% chromium <Cr> <commonly known as Cui>

4, black. Containing more than 2% chromium <Cr> and iron <Fe2+>

5, purple. Elemental chromium <Cr>iron <Fe>Cobalt <Co>

In particular, the green color of Burmese jade, in addition to its bright color, very durable, it can be worn regardless of identity, status, age, gender. Therefore, it is in line with the Chinese's implicit, peaceful, gentle and intimate personality. The demand for society is rising. Prices have also doubled and even increased by a hundredfold. At present, the price of a green and green bracelet on the international market has reached more than 10 million yuan. Even the jade-colored jade jewelry, as long as it is a real A goods, water head, craftsmanship, color coordination, but also expensive.

Third, the quality of Myanmar jade and identification common sense. Regardless of the amount of minerals or the amount of mining in Burma, good jadeite is very limited. Therefore, some speculators and merchants who are profitable are “thinning”. A large number of fake sales, from which to profit. Even in Myanmar in the Emerald Kingdom, fakes abound; fake stones and fake ornaments are everywhere.

The types of jadeites that are managed in the market are classified according to the true and false grades, mainly including the following four categories: A, B, C, and D. The raw materials and finished products of A jadeite are all genuine, and there is no one who works fakely. It is both natural and natural. B goods jade: There will be black spots commonly known as "dirty" jade, the physical suspension of the treatment, remove the cockroaches, increase transparency. By treating the structure of the jadeite that has been destroyed, its quality has been reduced by changing its optical and physical properties. C goods in Burmese jade: completely for artificial coloring and D goods for counterfeiting.

One of the methods to identify artificially treated jade: the drip method. Natural jadeite is dripped with concentrated hydrochloric acid. In a few seconds or minutes, there will be sweat on the surface; artificial treatment does not.

The second method of identifying artificial treatment of jade: tapping. Gently tapping the natural jade, it is a crisp and pleasing sound; knocking on the artificial treatment, it is a low dull sound.

The third method for identifying artificially treated jadeite is acid baking. Rub it on the jade with concentrated acid, and bake it with a red pin. Repeat the two or three times to change the yellow zoom. The spot is artificially treated with jade, and the spot is not natural jade.

Jade collection and appreciation and identification of A, B, C goods

At present, the types of Burmese jade that are popular in the market are classified according to the true and false grades, and there are mainly the following four categories:

A goods are both natural and natural. The identification method looks at the following three points:

(1) Think twice and act with discretion. Due to the relationship between mineral deposits and mining volume and the specific conditions for people's large demand, there are few good jade jade on the market. In particular, the colors are green and the variety of the ground is very small.

(2) Varieties such as sapling green, bok green, ochre or violet flower are common.

(3) Under the light, the texture is fine, the color is soft, the stone pattern is obvious; the slight impact, the sound is crisp and sweet; the handcuff has a heavy feeling, which is obviously different from the rest of the stone.

B goods will have black spots commonly known as "dirty" jade, soaked and corroded with strong acid, remove dirt, cotton, increase transparency, and then use high pressure to inject epoxy resin into micro-cracks caused by strong acid corrosion, to fill The role of cracks.

(1) B goods at the beginning of the color is good, carefully observed, the color hair hangs evil, observed under the lamp, the color transparency is weakened.

(2) B goods gradually lose their luster in two years, and they are covered with cracks and become very ugly. This is caused by the destruction of the original quality by strong acid.

(3) Density decreases and weight is reduced. A slight impact, the sound is boring, and the crisp sound of the A goods is lost.

C goods are completely artificially colored.

(1) At first glance, the color is not correct and evil.

(2) Under the lamp, the color does not exist naturally in the interior of the jadeite crystal, but is filled in the crack of the mineral, showing a network distribution without color roots.

(3) Observed with a Charles filter, the green color turns red or colorless.

(4) Scrubbing with strong fading, the surface color can be removed or turned brown.

D goods, D goods posing as jade jewelry mainly have the following two categories.

(1) Jade class. That is, other jade is posing as jade. There are mainly Thai jade and Malaysian jade, Nanyang Dushan jade, Qinghai jade, dense jade and Australian green jade and Dongling stone. The difference between the above jade and the jade of Myanmar: one is low hardness, the other is low density (light weight), and the gloss is weak.

(2) Green glass and green plastic. Most of these alternatives are ugly and the gloss is very weak. The relative density is very light, the hardness is low (the nail can be inscribed), and there is no cold feeling.

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