First of all, the international jewelry industry defines different concepts of natural gemstones and processing; Secondly, the different concepts of artificial optimization and artificial treatment are clarified: thirdly, consumers should be clearly informed of three different gems, namely N (natural); E (optimization), t (processing). Natural gemstones: refers to all gemstones that remain in a natural state without any artificial optimization treatment (except turning and grinding). Artificial optimization of gemstones: it means that the durability of gemstones has not changed and can be restored without adding external substances, which is traditionally acceptable, such as heat treatment. Manual treatment of gemstones: refers to the damage to the durability of gemstones, which cannot be recovered due to the addition of external substances. Traditionally unacceptable, such as artificial glue treatment.
Jade is a natural jade without any chemical artificial treatment. That is, n-type gemstones (natural).
Grade B jadeite is a kind of artificial bleached jadeite with glue injection. Epoxy resin is injected after bleaching, and its structure has been destroyed during bleaching (if it is exposed to strong light, heat and irradiation for a long time, its change will be accelerated, and yellowing and fading will occur).
C jadeite is treated by dyeing method, which has destroyed the quality of jadeite, and the dyed color can only last for a short time. These two kinds of jadeites are T-shaped gems (processed).
It can be seen that goods A are natural and are the most valuable in the jade market where things are rare. Because goods B and C are processed manually, the value is not high. For example, A jade bracelet with green glass can be sold for more than 1 10,000 in the market, while B and C are only worth several hundred yuan. This is the difference between goods A and B and goods C.
Bracelet is a kind of jadeite products, and this rule also applies. The safest way to detect A goods or B and C goods is to issue a certificate to an authoritative jewelry appraisal center.
What harm does C brand jade bracelet have to C brand jade? Theoretically, it is called dyed jade, but C brand jade cannot be dyed directly. Before dyeing, it goes through: strong acid soaking, acid etching the crystal structure of jade, dissolving its structure, and then injecting colloid.
Therefore, the whole processing flow will inevitably cause chemical residues, which will not only make jadeite lose its potential of maintaining and increasing value, but also cause hidden dangers to the panel.
Emerald bracelets are accessories that directly touch the panel. Wearing sweat and sebum for a long time will make chemical residues overflow slowly, leading to papules, erythema and other lesions on the panel.
Therefore, it is not recommended to buy and wear C jade bracelets.
How to distinguish a, b and c goods from the wax bracelet of jadeite? The color of jadeite in A cargo is distributed in blocks, and the depth is clearly defined. Floating flowers are mostly flocculent, massive or relatively uniform regional silk mesh, colorless blocks and spots.
B cargo jade:
The luster of (1) is weaker than natural jadeite. Observing its surface under a light source, it feels like the surface of a candle or pork.
(2) Generally, there are irregular cracks on the surface, which can be observed from an oblique direction with the help of a magnifying glass.
(3) The contrast between color and texture is obvious, and its color will feel messy and fluttering.
(4) The structure usually changes greatly. Observing the particles inside, you will feel loose and fragmented.
(5) The sound is dull and turbid when knocking (this method is mostly used for bracelets). Customers can hang strings with strings and beat them with jade or metal objects.
Simple identification method of class c commodities;
(1) Appearance color is often too thick, dim, colorless and easy to fade;
(2) Magnified observation: the color is concentrated in the near-surface cracks and particle gaps, and distributed in a silk network. Dye precipitation can be seen in large cracks, and clear fried cracks can be seen in colored jadeite.
(3) It turns red under Charles filter (chrome salt dyeing), but the jadeite dyed with inorganic dyes does not;
(4) absorption spectrum: the red zone shows obvious absorption band; The green jadeite dyed with chromium salt has a wide absorption band of 650nm.
(5) Strong fluorescence under ultraviolet lamp. Such as jadeite dyed red: yellow-green or orange-red fluorescence.
(6) The absorption peaks of jadeite dyed with organic dyes in infrared spectrum are 2854 cm- 1 and 2920 cm- 1.
(7) Cathodoluminescence microscope: The fluorescent colors are blue-green, yellow-green, etc. The cracks are filled with dark green, blue-white or colorless fluorescent substances, and the belt rarely grows, so the integrity and closure of the belt are low.
The difference between A-goods jade bracelet and B-goods and C-goods A-goods is the abbreviation of natural jade.
B. jadeite that has been artificially pickled and filled with glue.
Artificial dyed jadeite
B+C jadeite is artificially pickled, glued and dyed.
What's the difference between jade bracelets A, B and C? Commodity A: It has not undergone any artificial chemical treatment. It is pure natural jade. Its jadeite structure has not been corroded or destroyed. It's also an emerald bracelet, but in contrast, the price of an emerald A bracelet is many times higher than that of a B bracelet and a C bracelet.
B: Only after pickling, bleaching and gluing, there is no colored jadeite. The appearance of the water head is very good, indicating that the luster is rubbery, the knocking sound is dull and the price is relatively low. But good B goods are more valuable than bad A goods (don't think that A goods must be valuable, and there are also worthless bricks). Commodity b manufactured with the latest technology is very close to commodity a.
Goods C: Generally speaking, it refers to artificial dyeing, which is usually directly immersed in dyes for long-term heating dyeing, and sometimes it needs repeated heating. Note: Since it is necessary to dye, the structure of jadeite must be artificially destroyed, otherwise the dye cannot enter the interior. But this damage is not necessarily pickling.
The specific explanation is for specific things. You'd better go to Chuncui. Take a look at it. There are specific introductions above. I'm an amateur, too.
What's special about the black jade bracelet compared with other jade bracelets? The main difference is the material. Ink is black, emeralds are green, and ink emeralds refer to emeralds with green in black. This jadeite is pure black in natural light, but dark green in light.
At first, Cui Mo looked as black as ink, as if it had been dyed with ink, but this was not the case. Cui Mo's black is green-black, which is made up of thick green. Different from black jade, black agate and black diamond. Cui Mo is completely different from this kind of material, and its rise time is not very early, so not many people know it, and there are few Cui Mo circulating in the market.
The reason why jade can spread from the beginning and become the king of jade in Chinese jade culture is not only the material of jade itself, but also its colorful colors and rich cultural connotations, which won the hearts of the people. The common colors of jadeite are colorless, white, green, black, yellow, red and purple. Although it is called black, dark green black is a visual change caused by dark green.
The formation of Cui Mo:
The mineral composition of Cui Mo is mainly omphacite, but there are also a small amount of jadeite, albite and other minerals. Although the color appearance of Cui Mo is so different, it also has the quality of water and color, just like other jadeites. Cui Mo's internal crystals are usually very small, and some Cui Mo crystals have larger particles. The arrangement and combination of crystals are also different, and the luster and hardness of jadeite with close arrangement and combination will be better than that of ordinary arrangement. The crystal thickness and density of Cui Mo directly affect the transparency of Cui Mo, which is generally translucent or opaque.
How to distinguish a, b and c products of jade bracelet? First use the fluorescent lamp to see if there is any discoloration. The discoloration is fake. Then observed by Celsi color filter, the colored emeralds are purplish red under the microscope, and the natural genuine colors remain unchanged. Some fake jadeites are artificially melted by glass, with loose structure, uniform and dark green color, some with bubbles, and hoarse when struck with hard instruments. Fake jade: Ma Laiyu (Emerald) is as transparent, green and beautiful as high-grade jade. But it's not hard to identify. Looking at it with a magnifying glass under strong light, there are fishnet-like patterns inside. The mesh of fishing net is green, and the mesh is white, unlike the green in jade, which is uneven in size and shape. cfjyc。 /category.php？ Id=24。 There seems to be an expert to help identify it.
Is the jade bracelet good? What's the difference between them? Hello, landlord, this must be a good product. A penny for a penny, the best jade price of B goods is not as good as the worst of A goods. A-grade jadeite doesn't mean inferior quality in ordinary clothes. Goods A are natural jadeites without any artificial chemical treatment, and their jade quality, color and structure are all natural. Only jadeite is valuable for collection. Landlord can go to dgknl. Let's have a look. They specialize in jade jewelry trading, and there are also many professional introductions related to jade. You can supplement the jade knowledge inside. That's where I learned this.
What's the difference between a jade bracelet and b jade bracelet? The difference between a jade bracelet and B and C is that:
1, A-goods jadeite, also called natural A-goods jadeite. It refers to jadeite that has not been chemically treated. A cargo of jadeite is usually called true jadeite;
2, B cargo jade, also known as processed jade, optimized jade. Refers to the jadeite that has been chemically treated, chemically removed impurities and injected with color. B cargo jade can also be called fake jade;
3, C goods jade, also known as counterfeit jade. Refers to the use of other jade species (such as agate and water foam). ) pretending to be jade by means of chemical coloring. C jade is not jade at all.
To sum up: only A jadeite is the real jadeite, while B and C jadeite are not the real jadeite. B and C grade jadeite is chemically treated, and long-term wearing will affect health. Caution is advised.
What's the difference between a jade bracelet and a princess bracelet? Princess bracelet is suitable for women and young people with small wrists. Round bracelets are suitable for women of all ages. Round bracelets use more materials than princess bracelets.