There is a kind of jade called stone instead of jade. Shaped like a pine ball, near the green pine? It's blue-green. In recent years, more and more jewelry lovers are attracted by this blue-green color.

How popular is turquoise?

Turquoise is a mineral composed of water, copper and aluminum phosphate. The types and proportions of minerals are slightly different, which makes them show different colors such as blue, blue-green, green and yellow-green.

Turquoise is one of the oldest jade in the world. From ancient times to the present, we have witnessed the development and progress of human civilization in the long river of history.

In China, there are many legends about turquoise. It is said that the goddess of mending heaven is located in the mining area where turquoise is produced. Five-colored stone? It means turquoise.

As early as the Neolithic Age, turquoise products appeared in China, which the ancients called? Bi Dianzi? 、? Green stalk? . In ancient times, turquoise was a symbol of dignity, which was usually found only in the palace.

In Tibet, turquoise has a strong religious color. Tibetans believe that turquoise is the embodiment of God and has irresistible power. Commonly used in Buddhist beading.

In foreign countries, turquoise is still regarded as an evil thing and has a long history of mining. As early as 5500 AD, Egyptian pharaohs wore turquoise.

Former First Lady Hillary Clinton often wears turquoise to many occasions.

Teach you to choose turquoise.

China is an important producer of turquoise, accounting for 60%~70% of the world's output. Shiyan, Hubei Province is the most important producing area of turquoise.

For a long time, the light of turquoise was covered by several other jadeites, and the price never reached the highest. But in the past decade, turquoise has increased at least tenfold, and turquoise has become the first choice for collection.

Color, hardness, clarity, texture and the presence or absence of iron wire are all factors that need to be considered when purchasing turquoise.

The highest grade of turquoise is porcelain pine, also called Persian grade. This kind of turquoise has uniform natural color, high hardness and strong luster, and has a condensed porcelain luster.

The turquoise color of the second-class products is mostly dark blue, blue-green and emerald green, with hard texture and strong gloss, and the price is slightly lower than that of the first-class products.

Third-grade turquoise is generally light in color, light blue, light white and so on. , poor hardness, rare in the market. There are often unscrupulous merchants who pretend to be high-quality turquoise after dyeing with three-grade turquoise. Be careful when buying!

Turquoise forgery

Like colored gems, some turquoise on the market has been optimized. With the rising price of turquoise, there are also synthetic and counterfeit products.

manual handling

Strictly speaking, the optimization of turquoise should be divided into optimization and manual treatment. Optimization is accepted by the market, while manual processing requires special labeling.

As we all know, the hardness of turquoise is generally low, and rarely reaches the level of porcelain pine, so 90% of turquoise has been optimized. Generally, in the last step of turquoise processing, wax will be optimized to increase the luster of turquoise and also play a protective role.

There are also some manual processing methods, such as dipping and pouring.

Plastic dipping refers to soaking the raw ore or semi-finished product of turquoise in colorless resin, and then heating it in an oven to cure the resin.

Also called glue pouring? Glue injection? It refers to adding crisp and fluffy pine or white pine that does not belong to turquoise family to colored pigment, melting at high temperature, then sealing and pumping, which is similar to high-quality turquoise after processing.

Turquoise processing, processing and synthesis are so common that everyone must have doubts: how to identify it initially when buying?

For the optimized turquoise, there are mainly water measurement, refractive index and visual inspection to judge.

Water measurement method: untreated turquoise water will be absorbed immediately, turquoise soaked in glue or wax is difficult to absorb, and turquoise injected with glue will not be absorbed at all.

Refractive index: Refractive index reflects the amount of mineral impurities. Generally, the refractive index of turquoise treated with glue will be lower than 1.438+0.

In addition, each natural turquoise is different. If each bead is carved with the same mold, it can basically be judged that it has been processed.

Synthetic

In addition to optimization, there is also synthetic turquoise. The main raw materials for synthesizing turquoise are ceramics or materials similar to surrounding rocks, and their physical and chemical properties are very similar, and some of them even look more beautiful than turquoise.

(The picture shows synthetic turquoise)

For synthetic turquoise, we can judge it by color, composition and structure.

Natural turquoise is rich in color and unevenly distributed, while synthetic turquoise is single in color and dull.

Microscopically, natural turquoise has tiny patches and voids, while synthetic turquoise has uniform composition.

(The picture shows synthetic turquoise)

The natural iron wire of turquoise is an important point that distinguishes it from other jade. Naturally formed iron wires are unevenly distributed and have a concave-convex feeling, while synthetic iron wires are uniform and rigid, and have no three-dimensional sense.

In fact, there are some turquoise-like stones in nature, such as gibbsite and chrysocolla.

Gibbsite is light in color and glassy, and smells like earth and turquoise.

Chrysocolla, on the other hand, is bright and slightly transparent, and will turn black after heating.