The resin in B goods will not be affected by external forces, and generally it will not be too harmful;
After B+C or C goods are dyed, the acid solution may be harmful to the skin, because some businessmen may use strong acids such as hydrofluoric acid, nitric acid, sulfuric acid and hydrochloric acid to imitate the guqin color of jade, and then coat the surface of fake ancient jade with a layer of floor paint, crystal paint or epoxy resin.
Hao, the most authoritative director of occupational poisoning medicine in China, said: When resin reacts with strong acid, it is likely to cause irritation. People will suffer from contact dermatitis after contact, with symptoms such as redness, tingling, itching, nipple hardening and peeling. People with sensitive skin are most prone to symptoms. In the early days, most small hospitals were diagnosed as common skin infection, so they bought some anti-inflammatory ointment to perfunctory things. Unfortunately, patients will still cause cancer after a long time. In the end, they died without knowing that the culprit was fake jade. At present, there are thousands of such cases in China.
For health and safety, it is best to wear natural jade without chemical treatment. (The picture below shows the jadeite bracelet filled with resin after chemical bleaching and dyed with hydrofluoric acid, nitric acid, sulfuric acid and hydrochloric acid. Pay attention to the green place, there is no color root, obviously dyed. )
First, several common dyed jadeites in daily life.
How to identify jade with naked eyes? The dyed jadeite in the picture below, that is, the original colorless, light green or loose green jadeite, was artificially changed by adding foreign dyes during the processing. There are usually two kinds: one is to dye green or purple on white or colorless jadeite. The other is to add a strong color to the natural color.
Dyed bracelet judgment:
1, dull, obviously oily, waxy luster;
2. The color is unnatural and floating, which is the result of dyeing.
3, the foundation is pale, the structure is loose, and you can see the grid pattern when you zoom in.
The picture below shows the embryonic form of dyed bracelet hair embryo:
The following picture shows the formation process of dyed bracelets:
Dyed bracelet molding (real A goods are green and purple, and the price is at least millions. And this kind of fake bracelet, the wholesale price is not a few hundred yuan, and all jewelry stores in Sanmen generally sell this kind of dyed bracelet with a price tag of tens of thousands. )
Second, how to identify jadeite with naked eyes for several fake jadeites that are common in the market? .
One of the fake jadeites: chrysoprase is a low-grade gem. The English word chrysoprase comes from the Greek words chrysos and prason. It is a fibrous time containing nickel, usually apple green, but the depth is different.
It is a timely silica mineral, and its physical properties are the same as those of the timely silica mineral. Chlorite is fragile and green and translucent. Green color is caused by hydrated nickel silicate, which will fade when heated or exposed to sunlight. People think chrysotile is a low-grade gem. Origin: Australia, Madagascar and eastern Taiwan Province Province.
Chalcedony has a hardness of about 6.5, a density of 2.58~2.64 and a refractive index of 1.53~ 1.54. Translucent to slightly transparent, glass luster to grease luster, good toughness, almost all colors can be seen.
Do you know the price of such a green necklace? 20 yuan, scared you to death! But it's really only worth 20 yuan.
Fake jadeite: Ink jade is the common name of albite jade and quartzite jade; In the border area between China and Myanmar, it is also commonly known as "water foam"; Tengchong and Ruili, on the border of China, Myanmar and Yunnan, are called "Mozi" by local people, and they are named after the glittering and translucent jade.
Refractive index: 1.52- 1.54, point measurement: 1.52- 1.53, hardness: mohs hardness 6. Density: 2.6-2.63g/cm3
This material is made into bracelets, and the wholesale price is 60 each, as many as you want.
Fake jadeite: How to identify jadeite with naked eyes? This kind of jade is called "tumbler" in hydrogrossular industry, and it is a polycrystalline aggregate of calcium-aluminum garnet, also known as South African jade or Delanwa jade, and commercially known as "Qinghai Cui".
Appearance characteristics: glass luster, head difference, translucent to slightly transparent, transparency is generally good. Green has spots or stripes. Hardness and feel are similar to those of jadeite, and it is easy to mix with dried jadeite.
Gemmological characteristics: The main mineral is hydrogrossular, followed by zoisite, Fushan stone and hornblende. It turns deep purple under the color filter, which is actually garnet. The hardness is 6.5-7.0, the density is 3.47 (+0.08, -0.32, which is overlapped with the density of Burmese jadeite, so it is difficult to distinguish by weighing method), and the refractive index is 1.7 1- 1.72. There are often black chromite, and this spot is also an important feature to identify hydrogrossular.
Origin: In metamorphic rocks or gravels in Sri Lanka. In Madagascar, almandine is called cinnamon stone. Other producing areas are Brazil, Canada, Siberia (Russia), and Maine, New Hampshire and California in the United States.
Look quite nice! Like an emerald bracelet! 120 1. You need more than one train. You are dumbfounded. This is a domestic jewelry store with a price tag of tens of thousands.
The fourth kind of fake jade: dushan jade is produced in Dushan, Nanyang, Henan Province, also known as "Nanyang Jade" or "Henan Jade", and some are simply called "Duyu". A mineral aggregate consisting mainly of plagioclase and plagioclase zoisite. Common colors such as yellow, green, white, cyan, purple, red and black are characterized by rich colors and uneven distribution.
The crystal morphology of dushan jade is mainly fine crystal; Fine particles, particle size less than 0.05mm, aphanitic, fine texture, hard and dense. Hardness: 6.0-6.5. Specific gravity: 2.73-3.18g/cm&; Sup3, transparency: transparent to translucent. Gloss: the luster of glass or grease. Black spots can be seen under the microscope, and the color is not bright, and various mineral inclusions can be seen. Needless to say, it is similar to the price above.
The fifth kind of fake jadeite: prehnite is a silicate mineral, which generally appears in caves of volcanic rocks and sometimes on stalactites. The color of prehnite varies from light green to gray, with white, yellow and red tones, but green is common. Transparent and translucent. Their shapes are plate-shaped, sheet-shaped, grape-shaped, kidney-shaped, radial or block-shaped aggregates.
Prehistoric rocks. Produced in Luzhou, Leshan and other places in Sichuan Province. The color of stone is mostly green, and there are raised color blocks on the stone surface, which are like grapes, hence the name.
Prehnite features: Fracture: hackly fracture. Mohs hardness: 6 ~ 6.5. Density: 2.80g/cm3 ~ 2.95g/cm3. Others: crisp.
Hehe, like the glass species of the best jadeite, the ring surface of Zhenzong jadeite is at least 30,000. This one? Hehe, you can buy three for one hundred dollars.
The sixth kind of fake jade: quartzite jade is also called Miyu, Emerald, Dongling Jade, Jingbaiyu and Cui Xin. It is a dense block composed of granular timely aggregate, and its timely content is above 90%. Besides stones, it often contains chromite, sericite, lepidolite, hematite, glaucophane and other minerals. When other minerals are contained, they can be green, turquoise, blue-green, blue-purple, lavender and other colors according to the types and quantities of minerals contained. Quartzite jade has a hardness of 7, a density of about 2.65, a refractive index of about 1.54, and a glass luster.
Most of the producing areas in China are cheap stones, remember that they are not jade. I don't want to laugh. A friend spent 6.5438+0.3 million to buy two. Tragic, the wholesale price is 80, as much as you want.
The seventh kind of counterfeit jadeite: Qinghai jade is composed of almandine, diopside, pumice and chrome spinel. Polycrystalline polymer, cylinder, gray background. Green and turquoise are spotted, slightly transparent, oily and shiny, with hardness H=6.0-7.0, specific gravity SG=3.5, dense texture and high toughness. It is a rare gem variety, which has a bit of "emerald" flavor because of its turquoise chrome spinel spots. Carve it into jade.
The color is light green and grayish green, with poor gloss and insufficient water head (transparency). Qinghai Cui has low tensile strength, and it is easy to break when it is processed into a ring, so it is not suitable for processing delicate ornaments. The main producing area in China is Wulan, Qinghai, also known as Wulanchui. This is a small quantity in the market. It is estimated that a bracelet can kill a large number of people. Put it in a jewelry store, it will become green jade on a white background, and then mark it with tens of thousands.