The five questions of lapis lazuli can't be answered, then you still don't buy it.

The lapis lazuli, also known as the green gold, is known in the ancient times as Yulin, Jinjing, Yuyu, Qinglan, etc. It is a relatively rare gem. "Shi Ya" cloud: "The lapis lazuli color is like the sky, or the complex gold shavings are scattered, brilliant, if the stars are in the sky."

Because the lapis lazuli "hue is like the sky", it is the royal emperor's product, whether it is the pilgrimage or the pilgrimage. Therefore, the ancient lapis lazuli in ancient China is a symbol of the majesty of heaven. In ancient Egypt thousands of years before BC, lapis lazuli was of equal value to gold. At the same time, lapis lazuli is also regarded as a “treasure” by the Arab countries, and Afghanistan also regards it as the “national stone” of its own country.

青金石

Recently, the lapis lazuli market has seen a rise, but if you really want to start lapis lazuli, you still have to understand it first. Here are four questions. If you are wrong, please consciously go home and continue to study hard.

Q. In the picture below, there are two pieces of green gold, one big and one small, one deep and one shallow. Which one should I choose?

青金石

A, the left side

Color: Generally speaking, the deeper the color, the better the quality. But the color does not mean all. Can not only look at the depth, mainly depends on the saturation, and the degree of uniformity. In the figure below, the color on the right is dark, but the color is uneven and not saturated. Although the color is light but uniform, it is pure and pure. So the value on the left is high.

Q. Choose two ring face inlays. Which of the three green gold in the picture below should be abandoned?

青金石

A, the leftmost one

White and gold: We can use white and gold to define the quality of green gold. Many materials will not have obvious white. The merchants say that they are white, but they are very uneven in color, poor in saturation and turbid in color. Therefore, it is also white, and the grade is much different. It needs to be combined with color and material quality. In the above picture, the three ring faces are white, but the color saturation on the left is obviously not comparable to the two on the right.

Q. The rough gold in the picture below, a lot of gold, is not a pure best green gold, should not give up buying?

青金石

A, of course not!

With regard to gold, one of the characteristics of the best old materials is that the color of gold is extremely bright and small, like gold foil on the surface of the green gold, such as star-studded, quite beautiful. Many people think that there is a small amount of this gold, it does not affect the quality, and it is very beautiful.

Q. Which of the following two figures is lapis lazuli?

青金石

A, the next piece

The basic method for distinguishing old and new materials is that everyone knows that the new material is a sheet of material, a layer of white and blue, like pork belly, and the blue part of the old material is blocky. If you see a white or yellow layer on the finished product, it is simple, it is a new material. The above two pictures, the new material above, the old material below. Look closely, the color of the old material is painted like a brush with full of pigments. The color is thick and shiny, the color of the new material is dark, the density is slightly poor, and it looks dry.

Picking a Trilogy of Trilogy

A look at the color: lapis lazuli in blue, rich, pure, uniform is the best, such as interlaced with white stone or white spots, it will reduce the color concentration, purity and uniformity.

Second look at the texture: the texture of the green jade should be dense, delicate, no cracks, sparkling starlight. The local distribution of pyrite will affect the texture of the lapis lazuli jade, and the more obvious the crack, the lower the quality grade.

Third look at the volume: under the same quality conditions, the larger the volume of the green jade block, the higher its value.

Medical Silicone products

Medical grade silicones are simply silicones that have been tested for biocompatibility and can be used for medical applications. medical grade silicone for our healthcare industry clients. When designing medical devices and tools, materials that can be easily cleaned and sterilized without degrading or breaking down are key. Platinum-cured liquid silicone rubber (LSR) is the specific material we use in our healthcare products because it`s durable and has the ability to be disinfected in many different ways.

Silicone valves, also known as One way valves, non-return valves, air flow valves, rubber check valves, which are used for controlling the direction of fluids` flow. Our silicone valves can be universally applied in many different applications, whether in the health care, automotive, appliance or food and packaging industries. Silicone valves include umbrella valves, duckbill valves, membrane valves, flapper valves and diaphragm valves, etc.

Medical Grade Silicone,Liquid Silicone Rubber,Silicone Rubber Sheet Non Slip Medical,Medical Custom Silicon Products

Xiamen The Answers Trade Co.,Ltd. , https://www.xmanswerssilicone.com

Posted on