Notizie di gioielli

gemstone earrings wholesale Polarizer: distinguish glass and crystal in one second

Pubblicato il da Kingjy

The biggest counterfeit of crystal is glass. Many people may want to go beyond the question: Is there a tool that can quickly distinguish between glass and crystal without much professional knowledge and can be used at a glance? The answer is yes, the polarizer is what you are looking for.

Polarizer is a necessary instrument in gem identification laboratories, which can quickly determine the crystal state of gems. With the advent of portable polarizers, this kind of instrument is fully functioning outside the laboratory.

As a very professional gem identification instrument, the structure of the polarizer is unbelievably simple. Infatti, it is two polarizers plus a light source. Many sunglasses on the market now use polarized lenses. If the two polarized lenses are removed and a flashlight is used, this is a simple self-made polarized lens.

A polarizer is an optical element that can absorb a large amount of light and only let light in a specific vibration direction pass. When the two polarizers are perpendicular to each other, no light can continuously pass through the two polarizers, so the field of view looks completely black. This phenomenon is called extinction.

Before using the polarizer to observe the gemstone, the polarizer should be adjusted to the extinction position, so that the working state of the instrument can be reached. In questo momento, place the transparent gem between the two polarizers and rotate the gem, and different phenomena will occur.

Usually we can see three completely different phenomena: some gems are always black under the polarized lens, and no light can penetrate through; some gems flicker and darken under the polarized lens. If you observe carefully, you will find that the gem turns around once During the process, there will be a total of four light and dark alternations; some gems are always bright under the polarizer, and there is no extinction position.

Only non-crystalline and equiaxed crystals, such as glass, granato, spinello, diamante, ecc., can always extinct under polarized light. In addition to the equiaxed crystal system, all crystals of the crystal system will appear four bright and four dark under the polarized lens, such as crystal, tormalina, acquamarina, topazio, ecc. What is the situation of those who do not extinct under the polarizer and keep full brightness?

This must be a crystalline aggregate, which is what we often call jade, such as jade and agate.

Now you should know how the polarizer can quickly distinguish between glass and crystal. That’s right, just put the gem on the adjusted polarizer and rotate it, and the answer will come out immediately. It is glass that is always extinct, and the one that is bright and dark must be crystal. It is indeed done in a second.

But it needs to be reminded that unless you have enough evidence that the gemstone tested is one of glass and crystal, a polarizer can help you draw a conclusion within a second. If it is a gem that you are not sure of what kind of gemstones always appear to be extinct on the polarizer, you must not conclude that it is glass. Don’t forget, it will also appear in gems of the equiaxed crystal system like garnet. fenomeno. Similarly, it is impossible to confirm that the gemstone measured is a crystal as soon as you see the phenomenon of four bright and four dark, because the phenomenon of all gems is the same except for a few gems of the equiaxed crystal system such as diamonds.

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