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 appear medium 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 you dig a small piece from the part of natural turquoise that doesn't contain 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.