(1) Look at color and purity.

The darker the color, the purer and more uniform it is, and the higher the purity, the greater the possibility of turquoise counterfeiting; On the contrary, the more likely it is to be genuine. Because of its special formation, turquoise is often mixed with many traces of iron wire and water erosion, and there are few net goods with high purity, especially large goods. Once collectors see a large number of high-quality and high-purity goods, 90% may be turquoise injection. If the price is lower, 100% is imitation.

(2) Look at density, hardness and brightness.

The greater the stone density, the greater the hardness, and the higher the weight and brightness.

The heavier, harder and brighter it is, the more likely it is A goods. The reason why "the greater the possibility" is because there are two kinds of glue injected into B goods and imitations: one is made in China, and the brightness is not too high, which is easy to distinguish; The other is imported, and the brightness can be completely comparable to that of A goods, but the weight of B goods is usually lighter, and white turquoise and miscellaneous stones can't be displayed. C goods have obvious stains and obvious spots on convex and concave parts.

Third, look at the iron wire.

This can only distinguish imitations from genuine products, but not goods A and B. Genuine turquoise wire has clear texture, natural development and positive color; However, imitations are often vague in texture, stiff in extension and not black, white or yellow-brown in color. But there is a kind of imitation wire turquoise, because its wire is too clear and pure, but it looks fake.

Fourth, smell the color and taste.

Imitation goods and B goods (especially new products), the taste of glue will be particularly strong, even if it is left for a long time, there will be some smell in front of the nose; There is no A product (A product soaked with glue has some flavor when it is first made, and it will disappear within one month as time goes by).

(5), with fire

Imitation and B goods are filled with glue, which turns black after fire and smells like glue; A goods don't change color (dipped goods may have a little glue smell and slightly yellow).

(6), see the cracks

If there are a lot of miscellaneous cracks on the jewelry, and it is still very wide and long, it must be B. Because of poor quality, it is naturally easy to crack when injecting glue at high temperature; If there are many and miscellaneous cracks, the thinner, denser and whiter traces, 98% may be dipped in A goods. If there are many defects, few cracks or no cracks, slender and compact, gray-black, it is generally natural A goods, while imitations usually have no cracks.

(7) Destruction method

Many glued turquoise will be dyed at the same time, so the internal and external colors of the chopped turquoise will be very different, or the soaking experiment will be done again, and the glued turquoise broken noodles will not change color after the chopped turquoise.

(8) How to distinguish between "glued" and "colored" turquoise?

The best way to identify "glued" turquoise is to go to an authoritative testing institution for identification. If you identify yourself, you can refer to the following methods:

1. Under the irradiation of violet light with wavelength of 365 nm, the turquoise injected with glue has no fluorescence reaction. However, the method of violet light irradiation cannot be 100% accurate and can only be used as a reference;

2. Contact the turquoise surface with a hot needle for a short time (no more than 3 seconds), especially the iron wire and pits. If it is turquoise injection, it will smell the pungent smell of plastic melting, which is limited. If there is no glue at the contact position of the hot needle, it can't be accurately identified.

3. Use the method of soaking to detect.

The "soaking discoloration method" circulating on the Internet has been proved by many experiments that whether it is the original ore turquoise or the optimized turquoise soaking,

Will change color, and this method is not feasible on the network. The immersion test method I want to talk about here is different from that on the Internet. The specific operation is: clean the turquoise and soak it in clear water for a long time. Because of its low density and strong water absorption, the surface of turquoise will be evenly covered with small bubbles with a magnifying glass, while the turquoise injected with glue can not absorb water normally, and the bubbles are unevenly distributed. None of the above methods can achieve 100% accuracy, multiple combinations and comprehensive recognition. Color: The injected turquoise is dark in color, and sometimes there are different shades of color. Natural turquoise has a strong sense of grease and a strong natural luster, while the injected turquoise is dull and waxy.

Handfeel: Glued turquoise will have obvious "sticky" and "astringent" feeling, while natural turquoise has only a slight sticky feeling and no astringent feeling because of its strong water absorption. Identify the "hanging color" turquoise, mainly observing the color details. "Hanging color" is still colored with dyes, so the rougher the place, the easier it is to color. What is rough? The inside of the hole of the bead is rough and not polished. If the side and back of the torus or pendant are colored, these places will be darker. Even the iron wire will have different spots (the iron wire is mostly black, and the spots formed by dyes are mostly green or blue), so it can be determined that it is "hanging" turquoise.

(9) Look at the delivery address

Because the main turquoise producing areas and top mines in China are supplied from other areas around Shiyan, 70% of them are synthetic or Ma Song, and the delivery address is Shiyan.

Kankan store

There are many online supply channels, and it is difficult for people who see that the store is not a regular (shop) company store to defend their rights.

(eleven) looking for jewelry appraisal institutions.

If the product you bought is not at ease, if you are cheated, you can choose to find a jewelry appraisal center (China Geo University (Wuhan) Jewelry Testing Center). If you buy jewelry in the domestic authoritative organization 5k (even if the business is busy, you can't buy a cabbage), you can ask for the inspection certificate and don't buy it.