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

(2) Commodity grade: green, oily green, slightly transparent, mixed translucent emerald veinlets, variegated green.

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

2. Color division of jadeite:

(1) Precious colors: green, red, purple, yellow and blue.

(2) Plain colors: cyan, white, gray and black.

Extended data:

Selection skills of jadeite:

1, structure

The structure of jadeite is variegated structure, which refers to the structure formed by fine fibrous mineral crystals interwoven around transparent granular variegated crystals under metamorphism. In jadeite, opaque or slightly transparent white fibrous crystals are intertwined to form clusters of small white flowers, so they are called "stone flowers" or "stone brains".

Step 2 work

First look at its roundness. For example, whether its outline is symmetrical or not, if it is asymmetrical, it will affect the appearance. Secondly, look at the relationship between the thickness of the sliver and the ring mouth. Generally speaking, if the ring is small, the sliver should be correspondingly thin; The bigger the circle, the thicker the sliver.

For example, the inner diameter of the ring mouth is 50 mm to 55 mm, and the diameter of the strip is 6 mm to 8 mm; The inner diameter of the ring mouth is 56 mm ~ 65 mm, and the diameter of the strip is 8 mm ~10 mm.

Finally, see if the surface is polished (polished). Good jade bracelet, the ring size and stripe thickness are coordinated and beautiful, the processing is fine and regular, the surface is polished well, the feel is even and there is a sense of lubrication. A good bracelet with patterns and ornamentation, finely carved, polished in place, symmetrical and reasonable patterns and good feel.

3. Pit species

The pit species of jadeite is composed of structure and texture, and jadeite is composed of small crystals. The smaller the grain, the denser the texture, the better the transparency and the better the polishing effect.

In the jewelry industry, pits are divided into old pits (also known as old pits) and new pits (also known as new pits). Old pits have bright colors, high transparency and the best quality. Although the new pit is fresh and tender in color, its transparency is poor. Old pits and new pits are determined according to the age when jadeite was formed.

Step 4 color

The difference of jadeite color grade is reflected in the great correlation in value. When identifying jadeite, we must distinguish its colors, mainly red, green and purple. Green in monochromatic jadeite, rich and pure purple and red are all high-grade colors in jadeite, especially green is the most expensive. Emerald green should be strong, sunny, handsome, straight and harmonious.

There is a cross formula for the evaluation of emerald green: "strong, sunny, handsome, positive and harmonious;" Light, yin, old age, evil, flowers. "The best green varieties are ruby green, glass green, brilliant green and Mabel Miao. Others include: gray green, toad green, oil green, dark green, blue green, melon skin green, spinach green, blue water green, bean green, parrot green, onion heart green and yellow sun green.

5. Water head

Water head is the transparency of jadeite. The higher the water head, the better and more precious the germplasm is. You must be very careful when observing the head of jadeite, because the transparency is related to the thickness of jadeite itself. In addition, special attention should be paid to the place where the jadeite finished product has been tampered with, such as hollowing out the middle of the finished product.

There is also the need to pay attention to agate products, because the transparency of agate is better, so some people color agate to imitate jade. In Hongkong and Taiwan Province, the transparency of jadeite is also divided. It is rated as "pass", "release", "transparency", "ice" and "jade", among which "jade" is the top grade.

6. Di Zi

Jade land is better, whether it is expensive or green, the external texture should be fine and even, the internal texture should be solid, moist, clean and moist, and good land should be coordinated with the color of jade and take care of each other to set off the richness of jade color. The best jade floor is glass floor and egg white floor.

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