Put the jade under the fluorescent lamp and observe its color change. Goods A and C are unchanged, and goods B are fluorescent white. C goods are dyed, so their colors are distributed along the cracks and uneven. You can tell by looking closely at the naked eye. The specific explanation is as follows:

A cargo jade, natural jade, is a natural jade with natural color and structure without chemical treatment.

B-grade jadeite, bleached and glued jadeite, is a kind of jadeite that is glued by washing with strong acid. Soaking and cleaning with strong acid is helpful to improve the transparency and color of jadeite. C jadeite, dyed jadeite, is artificially colored jadeite, usually colored with organic dyes or inorganic dyes.

B+C jadeite is a jadeite that has been washed with strong acid, injected with glue and painted artificially at the same time.

estimate

Color is the first factor to evaluate jadeite, and the criteria for good color are: positive, strong, clear and uniform.

Positive: refers to the range of hue, which depends on the ratio of primary color to secondary color, that is to say, it should be pure green and not mixed with other colors. For example, oil blue is often mixed with oil blue, and its value will be reduced.

Thick: refers to the depth of color. As far as emerald green is concerned, the concentration is preferably between 70% and 80%, and 90% is too strong.

Yang: It refers to the lightness of jade color. The lightness of jade is mainly determined by the ratio of green to black or gray. The more green, the brighter the color. The more black or gray, the darker the color. Experts often use an image method to express the bright sunshine of color. For example, boxwood green, parrot green, onion heart green and pepper green all refer to the color of fresh sun. Spinach green, oil green, river green and dark green refer to dull dark green.

The fresher the jadeite, the higher its natural value.

Average: refers to the uniformity of jade color distribution. The color distribution of jadeite is generally uneven, so it is not easy to get jadeite with uniform color distribution.

The best color: it should be pure green with a green concentration of 70%-80%, bright sunshine and uniform color distribution. This kind of high-grade jadeite habit is called the old pit species by experts.

transparency

Emerald is polycrystalline, mostly translucent or even opaque. It is impossible to be as transparent as a single crystal gem such as jade, so that light can pass freely and appear crystal clear.

structure

It refers to the thickness of crystal particles that make up jadeite, the shape of crystals and their combination. In jargon, this structure is called "bottom" and there is a name called "ground".

clean

Like other precious stones, the purity of jadeite is a major factor in evaluating its value. The defects of jadeite are mainly white and black. When evaluating jadeite, the value of jadeite is determined according to the degree of damage to the beauty of jadeite next time. For high-end goods, the next time will be a serious shortcoming, but for low-end goods, the impact will be much smaller. Relatively speaking, black flowers are more influential than white flowers.

incision

The processing of jadeite products can be divided into bare products and carved products. Bare products have high requirements for raw materials, and there can be no cracks, because cracks are easy to see. Jadeite with cracks is mostly used to make flower pieces, and cracks can be covered by carving. Therefore, in the evaluation of nude products and flower pieces, under the same quality, nude products are more expensive than flower pieces except for particularly exquisite jade carvings.

crack

The existence of cracks is often fatal to jadeite finished products. With cracks, the value of jadeite will be greatly reduced, especially high-grade jadeite.

Generally, a flashlight can be used for perspective irradiation, and it is easy to see cracks.

Economic evaluation factors

1, transparency: translucent is the best, too transparent or opaque is not good.

2. Structure: The finer the particles, the better.

3, clear: the best without flaws.

4. Cutting: the design of "jade is not cut, the shape is carved, and the polishing is fashionable".

grade

(1) Super grade: bright green (emerald), apple green, glass floor (translucent, fine texture), even and bright, without impurities and cracks.

Commodity grade: green, oily green land, slightly transparent, translucent grandmother green veinlets and mottled green.

③ Ordinary grade: lotus root powder mill, bean green, light green, fine white and slightly transparent. Opaque jadeite is generally only used as jade ornaments.

The best place to sell jadeite in Kunming is the jing xing Flower and Bird Market, where the grade of jadeite is relatively high, as well as Aocheng Jewelry, which is also near the jing xing Flower and Bird Market, all of which are high-grade jadeite markets!