How to tell the true and false turquoise?

Question 1: How to tell the authenticity of turquoise from the authenticity of turquoise?

People often ask how to distinguish the authenticity and quality of turquoise. According to the experience of most sellers, the authenticity of turquoise can be distinguished as follows:

First, natural turquoise, like natural leaves, has no two patterns with the same color. If the whole necklace or bracelet is similar in color and pattern, it is either fake or post-processed.

Second, natural turquoise, because it is a stone, will not stick to your hands when you grasp it. Fake turquoise or treated turquoise will stick to your hands when you grasp it with your hands.

Three. If natural turquoise is burned, it will not produce black smoke and will not change color, while treated turquoise or fake turquoise will change color, produce black smoke and have the taste of glue.

Identification method of turquoise quality

First, look at the brightness, the better the brightness of turquoise, which proves that the harder the goods, the better the quality of turquoise will have the feeling of glass and some transparency.

Second, look at the colors and patterns. Good turquoise patterns and colors are beautiful and accord with people's aesthetics. A good turquoise color should be bright, not dull.

Three. Listen to the sound. Good turquoise sounds crisp. If the sound is dull, it is either treated turquoise or fake turquoise.

Turquoise that can meet the above three conditions is good turquoise.

Supplement:

There are two kinds of fake turquoise in the market, one is the great white stone in Inner Mongolia, which is colored with artificial glue later. Because it is processed in batches, the colors and patterns are very similar, and the luster of the stone is only superficial, so it will not feel transparent.

Matters needing attention in purchasing handicrafts:

True beauty is not to go with the flow, but to be yourself in the end.

Don't buy hearsay news, such as what kind of products are good and what is not. Personally, I think it is safest to buy what I like and what suits me, not to mention what some stores call high-priced good things. Don't buy it if you don't like it.

Question 2: How to distinguish between true and false turquoise? Turquoise is an opaque gem. There are light blue, medium blue, green blue, green and other colors, and there are variegated and dark spots and textures (the texture of turquoise is commonly known as iron wire). Good quality turquoise is relatively dense, which is beneficial to polishing and coloring; Poor quality and porous, easy to lose water and fade after sunlight irradiation. The blue of turquoise is made of copper, and the green is made of iron. But in a word, the quality evaluation standard of turquoise is: the bluer the color, the better, the less iron wires and the denser the texture.

There are two kinds of unnatural turquoise:

First, modified turquoise. In order to improve the appearance and color of some poor quality natural turquoise, improve its durability and make it easy to polish without breaking, wax injection and injection molding are usually used to modify natural turquoise. This practice is usually recognized by the jewelry industry. After all, there are too few high-quality turquoise. The main components of modified turquoise are still natural, but after the modification process, natural energy is lost a lot. If you buy it to get energy from turquoise, you'd better not buy this modified turquoise. There are several commonly used modification methods:

Wax injection-wax injection can make up the holes on the surface and deepen the color. The processor also uses liquid dyes to imitate the cobweb texture (iron wire) on the surface of natural turquoise.

Injection molding-Colorants are sometimes added in injection molding, which can make up holes, reduce the scattering of surface light, make turquoise show a moderate blue tone, and also improve durability. Turquoise injection molding is a very common treatment method, also known as turquoise stabilization treatment. There are a lot of stabilized turquoise on the market. The stabilized turquoise has good color and low relative density, and plastic will be precipitated by hot needle test.

Incubation treatment-can improve the color of turquoise, reduce porosity, without adding any impurities. The treated turquoise has a blue tone of "robin's egg". The turquoise treated by this method will be rich in dark blue near the crack, but the best way to find it is to send it to a professional gem appraisal institution for analysis: advanced detection means can find the turquoise treated by the hatchery, and the potassium element is abnormally increased.

Second, synthesize turquoise. This so-called turquoise has no natural turquoise ingredients at all, and of course there is no natural spirituality. If you buy turquoise for spiritual energy, don't buy this synthetic turquoise. Synthetic turquoise usually has the following kinds:

Gilson method is to synthesize turquoise by ceramic technology. After zooming in, you can see the blue particles distributed on the shallow substrate, which is also commonly known as the phenomenon of "cheese with wheat".

Synthetic turquoise has typical blue fine particles, and sometimes there are artificial "iron wires" on the surface. Dyed xonotlite is a cheap turquoise imitation, and the simple identification method is to show pink under Charles filter.

Glass can also be used to imitate turquoise, but their refractive index values are obviously different. Vortex lines and bubbles can also be seen in glass.

A mixture of mineral powders, cemented with plastic and epoxy resin after dyeing, can also be made into turquoise. In the manufacturing process, heating and pressurizing will produce pressure cracks, which can be seen by magnifying observation.

Some people say that those with wire are natural turquoise, and those without wire are artificial. In fact, this statement simply can't stand scrutiny-if a small piece of natural turquoise is dug out from the part without iron wire, isn't this piece natural? On the contrary, artificial turquoise can easily imitate the effect of wire. Therefore, iron wire can not be used as a standard to judge the authenticity of turquoise. However, I*C introduces you to an experience of identifying turquoise, which is also related to iron wire. That is, natural turquoise iron wire is often concave, while synthetic turquoise iron wire is generally not concave.

Natural turquoise iron wire is often concave.

Generally speaking, at present, high-quality turquoise suitable for polishing but not easy to break is very rare, so if you see a turquoise bracelet polished into beads or other specific shapes in the market, it will not be pure natural, but may be modified or synthesized. Only some turquoise bracelets with naturally irregular shapes and sunken iron wires can basically be judged as pure natural. But many people think the twisted turquoise is ugly and can't help it. Good things are hard to find. In addition, there are some small pieces of high-quality pure natural turquoise, but they are also very rare and expensive, so don't expect people to make bracelets with this material. This material is usually used to make rings, and no wire can be seen. You need to be extra careful when identifying. ...& gt& gt

Question 3: How to identify the authenticity of turquoise, how to identify turquoise, and how to identify turquoise. The reason why the price puts this article in the first place is to warn everyone that Wan Wen is almost priced now, and there is almost no leakage. How to identify turquoise? The scientific name of turquoise is "turquoise", which is named after its shape like a pine cone and its color is almost loose green.

Identification method of turquoise, how to identify artificial turquoise

One. price

The reason why I put this article in the first place is to warn everyone that Wan Wen is almost priced now, and there is almost no leakage. Don't go shopping with the mentality that you can't find it all day. This turquoise is not a thousand-eyed bodhi bought on the street. Everyone wants 10 yuan, so it's easy to get. Different from the south red agate, the texture is basically the same except the meat and color are slightly different.

And this turquoise, first of all, there will be the difference between raw ore, dipping, dipping, injecting and dyeing. After that, there will be differences in the degree of porcelain between the raw ores. After that, players will choose wire to look good and porcelain to look good. People who pursue higher will play Wulanhua, Yishuilan, Yungai Temple, Sleeping Beauty and so on.

Some points for attention when buying:

After talking about the above price, first of all, I would like to advise you that if the price is lower than the market price 15%, it may be a business promotion, or a friend who posted it wants to sell it. If it is less than 50%, then it must be carefully considered. To know how to distinguish whether to inject glue, let's briefly talk about the processing technology of turquoise.

1. Gravel produced by mining should be soaked in plastic barrels first. This is an ancient turquoise processing method. In order to ensure the strength of turquoise during processing, I wonder if you have ground south red agate and turquoise. Compared with Nanhong, turquoise is just like tofu. Let me add here. Almost all stone carvings are hand-carved, because machine carvings are basically broken.

2, dispensing, turquoise in the processing process, the wire suddenly cracked, then I don't want this turquoise? No, click 1.502 to continue grinding on it. So some players' turquoise will have a white belt at the iron line.

3, waxing, this is also a traditional process. Almost more than 90% of the raw ore turquoise on the market is waxed.

The above is basically what we usually call raw ore, that is, the belt can change color. There is also a glue or microgel in the middle. According to the merchant's excuse, you can generally use it to change color and the surface is a little bit. Everyone has a different opinion. Many gluers are called Qin Wei, so it's better to pay more attention. Tell the truth, and then talk about the fake!

Glue injection is to inject colored glue into turquoise with injection molding machine under high pressure.

(1) is a uniform color to the naked eye, almost a bunch of the same colors.

(2) Iron wire, the iron wire injected with turquoise is divided into wires, and most of them are along the grain and in pieces. Most of the iron wires of natural turquoise are like capillaries, which are distributed in disorder, because no one knows what this kind of iron wire is like before the gravel is opened.

(3) Iron wires and corners, generally, the raw ore is turquoise. No matter how well the iron wires are treated, there will be some depressions, some of which can be touched. This phenomenon will be more obvious if catching up with the iron line is just around the corner. To put it bluntly, the wire should have a sense of hierarchy, and the distribution of the wire is definitely not the same plane.

(4) Soaking in water and burning ultraviolet rays seem to be the easiest way to identify turquoise. As for fire and ultraviolet rays, generally the kind with more glue will react. I believe your eye, you shouldn't buy that kind of gum pimple, should you? (5) Drawing glass is also a reliable test method. There will be a white mark on the plastic goods, and the high porcelain of the raw ore will draw a mark on the glass.

Second, gilson synthesis method

1972, gilson company imitated and synthesized turquoise according to the ceramic manufacturing method. This synthetic turquoise can be identified by the following simple methods.

1. Yan * * * Identification method: We can distinguish from the color. The synthetic turquoise in gilson is single and uniform in color, while the natural turquoise is rich in color. Even the same spot, the color will be uneven.

2. Composition test method: We can distinguish it from composition. The composition of synthetic turquoise in gilson is relatively uniform, while natural turquoise contains many impurities, such as clay minerals such as kaolinite and halloysite, which are often assembled into tiny patches and veinlets filled between turquoise, and seasonal particles can also be seen.

Nodular lumps, dark brown structures and spots formed by limonite and carbon.

3. Structural inspection method: turquoise is synthesized by gilson method, and the structure is simple. When magnified 50 times, you can see it ... >>

Question 4: How to distinguish between true and false turquoise? Identification method

Imitation identification

1. gibbsite: a mineral coexisting with turquoise and turquoise.

The main difference with turquoise is that (1) its color is relatively light, and it is difficult to reach sky blue; (2) Its glass luster is different from the waxy and earthy luster of turquoise. (3) It is fragile and easy to collapse, while turquoise is tough. (4) Low hardness. It smells of earth. (6) The density is lower than that of turquoise. 2. chrysocolla is a mineral whose appearance is very similar to turquoise. The main difference is that (1) has bright colors and high transparency. (2) Low refractive index. (3) The density and hardness are relatively low. 3. Blue-green glass: The main difference is its glass luster and conchoidal fracture, as well as bubbles and vortex lines that may be seen inside. 4. Regenerated turquoise: It is made by pressing some turquoise particles and pink-blue substances at a certain temperature and pressure. This material can be identified from the following aspects (1): It looks like porcelain and has obvious grain structure. (2) Acidity test: it is blue because of copper-containing compounds, and copper salts can be dissolved in hydrochloric acid. Dropping acid on the surface and wiping it with a white cotton ball will fade.

Optimize the identification of turquoise

1. dyeing: put the finished turquoise into inorganic dye or organic dye to change the color. The following aspects show that (1) color is too uniform and unnatural. (2) The color is very light, the epidermis falls off, and light-colored nuclei can be seen in the pits. (3) Wipe with cotton ball dipped in ammonia water, which can fade. 2. Glue injection: inorganic colloid or plastic is injected to improve the stability of turquoise. (1) has low density and high hardness. (2) Hot needle experiment: When a hot needle touches some cracks or pits, you can smell the pungent smell when the plastic melts.

Purchase evaluation

turquoise

The evaluation and purchase of turquoise are based on color, texture and fragmentation. Its varieties are divided into: blue turquoise, light blue turquoise, blue-green turquoise, green turquoise and foam. It is blue and dark blue opaque or slightly transparent, with glassy surface, uniform color, soft luster and no brown iron wire. Turquoise is divided into transparent turquoise, massive turquoise, blue turquoise, linear turquoise, magnetic turquoise and spotted turquoise according to texture. Transparent turquoise is extremely rare and of high value. Magnetic turquoise is as bright as porcelain with high quality and high price. The international gem circle divides turquoise into four grades: Grade I (Persian), Grade II (American), Grade III (Egyptian) and Grade IV (Afghan). The first class is the best quality turquoise. Maintenance of turquoise. When wearing turquoise jewelry, it is best to keep a distance from cosmetics, perfume and other items to avoid damaging the gem jewelry. Because turquoise is porous, we should pay attention to avoid using heavy liquid to measure density, because tribromomethane and diiodomethane will discolor turquoise. Turquoise is delicate in color and afraid of pollution. Contact with tea, soapy water, oil stain, rust and alcohol should be avoided to prevent them from infiltrating into pores and discoloring gems. Turquoise is afraid of high temperature, so it can't be baked directly and exposed to direct sunlight to avoid fading, cracking and drying. Turquoise is hard and brittle, so don't bump against other hard objects, and pay attention when wearing it.

Edit other relevant paragraphs.

Optimization processing and its identification

In order to improve the appearance and color of some poor quality natural turquoise, improve its durability and make it easy to be polished without breaking, wax injection, dyeing and injection molding are usually used to modify natural turquoise. This practice is usually recognized by the jewelry industry. After all, there are too few high-quality turquoise. 1. Dyeing (1) is unnatural to dye turquoise. Turquoise dyed in the domestic market is often dark blue green or dark green, which is too uniform, but the color becomes darker at the crack. (2) The dyed turquoise is very light in color, generally around 1mm, and light-colored nuclei may be exposed in some places. (3) Wipe with cotton ball dipped in ammonia water, which can be stained with blue-green. 2. Injection molding includes injecting colorless and colored plastics, which can make up holes, reduce the scattering of surface light, make turquoise show a moderate blue tone, and also improve durability. Turquoise treated by injection (figure 12-5-7) can be identified by the following points. (1) refractive index: Generally, injection molding will be lower than 1. 1. (2) Relative density: The relative density of injection molding is relatively low, generally less than 2.76. (3) Hardness: The Mohs hardness of injection molding is generally 3-4, and the injection-molded turquoise is prone to scratches. (4) hot needle test >

Question 5: How to distinguish between true and false turquoise is an opaque gem. There are light blue, medium blue, green blue, green and other colors, and there are variegated and dark spots and textures (the texture of turquoise is commonly known as iron wire). Good quality turquoise is relatively dense, which is beneficial to polishing and coloring; Poor quality and porous, easy to lose water and fade after sunlight irradiation. The blue of turquoise is made of copper, and the green is made of iron.

There are two kinds of unnatural turquoise:

First, modified turquoise. In order to improve the appearance and color of some poor quality natural turquoise, improve its durability and make it easy to polish without breaking, wax injection and injection molding are usually used to modify natural turquoise. This practice is usually recognized by the jewelry industry. After all, there are too few high-quality turquoise. The main components of modified turquoise are still natural, but after the modification process, natural energy is lost a lot. If you buy it to get energy from turquoise, you'd better not buy this modified turquoise. There are several commonly used modification methods:

Wax injection-wax injection can make up the holes on the surface and deepen the color. The processor also uses liquid dyes to imitate the cobweb texture (iron wire) on the surface of natural turquoise.

Injection molding-Colorants are sometimes added in injection molding, which can make up holes, reduce the scattering of surface light, make turquoise show a moderate blue tone, and also improve durability. Turquoise injection molding is a very common treatment method, also known as turquoise stabilization treatment. There are a lot of stabilized turquoise on the market. The stabilized turquoise has good color and low relative density, and plastic will be precipitated by hot needle test.

Zachery treatment-can improve the color of turquoise, reduce porosity, and do not add any foreign substances. The treated turquoise has a blue tone of "robin's egg". The turquoise treated by this method will be rich in dark blue near the crack, but the best way to find it is to send it to a professional gem appraisal institution for analysis: advanced detection means can find the turquoise treated by Zachery, and the potassium element is abnormally increased.

Second, synthesize turquoise. This so-called turquoise has no natural turquoise ingredients at all, and of course there is no natural spirituality. If you buy turquoise for spiritual energy, don't buy this synthetic turquoise. Synthetic turquoise usually has the following kinds:

Gilson method is to synthesize turquoise by ceramic technology. After zooming in, you can see the blue particles distributed on the shallow substrate, which is also commonly known as the phenomenon of "cheese with wheat".

Synthetic turquoise has typical blue fine particles, and sometimes there are artificial "iron wires" on the surface.

Dyed xonotlite is a cheap turquoise imitation, and the simple identification method is to show pink under Charles filter.

Glass can also be used to imitate turquoise, but their refractive index values are obviously different. Vortex lines and bubbles can also be seen in glass.

A mixture of mineral powders, cemented with plastic and epoxy resin after dyeing, can also be made into turquoise. In the manufacturing process, heating and pressurizing will produce pressure cracks, which can be seen by magnifying observation.

Some people say that those with wire are natural turquoise, and those without wire are artificial. In fact, this statement simply can't stand scrutiny-if a small piece of natural turquoise is dug out from the part without iron wire, isn't this piece natural? On the contrary, artificial turquoise can easily imitate the effect of wire. Therefore, iron wire can not be used as a standard to judge the authenticity of turquoise. However, Qing Qing introduced an experience in identifying turquoise, which is also related to wire. That is, natural turquoise iron wire is often concave, while synthetic turquoise iron wire is generally not concave.

Natural turquoise iron wire is often concave.

Generally speaking, at present, high-quality turquoise suitable for polishing but not easy to break is very rare, so if you see a turquoise bracelet polished into beads or other specific shapes in the market, it will not be pure natural, but may be modified or synthesized. Only some turquoise bracelets with naturally irregular shapes and sunken iron wires can basically be judged as pure natural. However, many people think the twisted turquoise is ugly. Hee hee, there's nothing I can do. Good things are hard to find! In addition, there are some small pieces of high-quality pure natural turquoise, but they are also very rare and expensive, so don't expect people to make bracelets with this material. This material is usually used to make rings, and no wire can be seen. You need to be extra careful when identifying.

A lot of knowledge about jewelry identification is difficult to describe in words, it is an experience and a feeling. Because >>

Question 6: How to tell the true and false turquoise spacer 1? Identification of artificially treated turquoise.

There are two kinds of artificial treatment of turquoise: one is pouring turquoise, and the other is dyeing turquoise.

Watering turquoise refers to beautifying and improving the appearance of turquoise by oiling, injection molding or waxing.

Identification method: turquoise injected with oil and wax, probe its inconspicuous place with a hot needle, and then observe it with a magnifying glass, and you will find that there are small oil droplets precipitated. This test method must be fast, generally no more than 3 seconds, because turquoise is afraid of heat, and the sounding part will fade after a long time. Injection molding products can also be probed with a hot needle, and the peculiar pungent smell of plastic can be smelled. In addition, the rich pores of turquoise are filled with light plastic, and the density naturally decreases (2.0 ~ 2.4), so the weight will be lighter.

Dyeing turquoise is to dye light or mixed turquoise into sky blue with dyes. The texture of turquoise is very delicate, and the mineral particles are very small, so it is impossible to observe the color distribution with naked eyes. Identification method: ammonia is a common chemical reagent. If a small amount of ammonia water is dripped on the bottom or inconspicuous place of turquoise jade, turquoise dyed with aniline dye will fade or be bleached, while natural turquoise will not.

2. Identification of turquoise imitation

There are many imitations of turquoise, mainly chrysotile, dyed chalcedony, glass and porcelain.

Imitations of glass and porcelain look like turquoise, but they have a strong luster, and they are glass luster, not wax luster of turquoise. In addition, careful observation can find bubbles near the surface of fake turquoise. In addition, judging from the fracture, if it is glass imitation, the fracture is shell-shaped and has glass luster; The fracture of true turquoise is flat and dull, waxy or even earthy.

Chrysocolla is less dense and lighter than turquoise. In addition, chrysocolla is mostly glassy, while turquoise is usually waxy. Of course, the most important thing is that the structure is different, but it is usually not easy to observe with the naked eye and needs the help of a microscope.

Question 7: Turquoise identification method, how to distinguish between true and false turquoise is characterized by color, opacity and luster. It is sky blue, lake blue or light blue, sometimes blue-green or dark green, and it is only easy to mix with a few translucent to opaque gems. The rough surface of high-quality turquoise has oily luster, and the polished surface has glass luster and translucency. Generally speaking, it is not too difficult to distinguish turquoise from its imitation if you compare and experience it carefully.

Nevertheless, turquoise may still be imitated by some gems with similar appearance, especially after 1972, the synthetic turquoise entered the international market, which brought some difficulties to the identification of turquoise.

The chemical composition, structure, refractive index and relative density of synthetic turquoise are almost the same as those of natural turquoise. However, some people think that it can only be regarded as an imitation, because this synthetic turquoise can see a spherical structure under a magnifying glass, like countless closely packed balls, while natural products do not have this structure. Obviously, these microspheres are pressed together, at least in part by some kind of adhesive.

However, if you are familiar with the appearance, structure and physical and chemical properties of turquoise, you can distinguish turquoise from natural mineral imitation. There are many artificial materials, such as glass and plastic, which can be used to imitate turquoise. We can identify these glass and plastic imitations according to the following characteristics:

(1) imitations usually have swirl color (swirl pattern) and small bubbles, which are their important characteristics;

(2) The imitation substrate may be rough, instead of polishing the bottom like most turquoise;

(3) The imitation may have a banded mold impression or a small hemispherical groove on the surface, which is caused by the bursting of bubbles.

(4) Imitations usually have a low refractive index, although occasionally they may be similar to the refractive index of turquoise;

(5) A distinctive feature of imitation is that the fracture surface is glass luster, while the fracture surface of dense turquoise is grease luster. The fracture gloss difference between turquoise and imitation is very obvious;

(6) Imitation may contain impurity inclusions to imitate natural turquoise, but this impurity can even be washed off the surface. The real impurity (iron wire) in turquoise, because it is a little harder or softer than the matrix, the surface may be convex or concave;

(7) The relative density of imitations may be different from that of natural turquoise, especially plastic imitations are usually small, so they are easy to distinguish. It is worth noting that repeated testing should be avoided when testing the relative density of turquoise, because repeated solutions may discolor turquoise with high porosity.

Some imitations can be identified by soaking in water, and will turn dark blue or soften when soaked in alcohol.

Question 8: How much is a gram of turquoise? How to tell the truth? Hello, I'm glad to answer your question:

In recent years, the price of turquoise has soared, which is not the stall of a few years ago. Now the price of good turquoise is thousands, and the price of ordinary turquoise is around 200. In recent years, Zhushan, Hubei Province, the largest producer of turquoise in China, has integrated turquoise resources to seal mines and protected turquoise resources, but the price of turquoise has soared. Although the price of good turquoise is thousands now, I think the scarcity of turquoise resources and the scarcity of real best turquoise are reasonable.

Identification of authenticity is as follows:

The preciousness of turquoise has developed more imitations, so in order to remind everyone not to buy turquoise at home, I will introduce the identification method of turquoise in detail.

1. gibbsite, a mineral coexisting with turquoise, is light in color, so it is difficult to reach the sky blue like turquoise, and it is very easy to collapse. The most important thing is that its luster is completely different.

2. chrysocolla is completely similar to turquoise in appearance. If you are not an expert, you can hardly recognize it. The main difference lies in its color. The color is brighter and more transparent than turquoise, so the hardness is relatively low.

3. Blue-green glass is actually very easy to distinguish, which can be seen from the luster of the glass and the spiral lines inside.

4. Artificial turquoise is composed of some turquoise powder blue substances and particles. But if you wipe it with acid drops on a cotton ball, it will fade.

If it helps your answer, please accept it. Thank you!

Question 9: What are the methods to identify the authenticity of turquoise? Several simple methods to identify turquoise are for reference only.

The water measurement method can put turquoise in clear water, and the untreated water will be absorbed immediately, while the absorption of wax-soaked and glue-soaked is slow, and the glue-filled one will not be absorbed at all, and there is an obvious waterline at the joint.

Through visual inspection, the surface without optimization treatment is often uneven (especially with many patterns), especially the iron wire is uneven. The optimized surface is very smooth. The surface without optimization treatment is ceramic luster, the surface soaked with wax is waxy luster, and the surface soaked with glue is colloidal luster. In addition, if dyed, its color is too uniform and unnatural, and the color depth is very light. Peeling and light nuclei can be seen in the pit. Wipe with cotton ball dipped in ammonia water to fade.

Touch, natural turquoise, will not stick to your hands when you catch it, while fake turquoise, or treated turquoise, will stick to your hands when you catch it.

Combustion method, natural turquoise, if burned, will not produce black smoke and will not change color, while treated turquoise or fake turquoise will change color, produce black smoke and have the taste of glue.