wholesale gemstone pendants Distinguish between glass and crystal under polarizing lens

If the crystal you are testing is bead-shaped, when you turn the crystal, in addition to seeing the phenomenon of light and dark changes, you will have amazing discoveries. At a particular angle, you will see a colored interference pattern as shown in the figure below. The pattern is a hollow black cross with colored stripes. Because the red part of the center circle resembles a bull's eye, we call it a bull's eye interference pattern.

The reason for the formation of interference patterns is very complicated, but the phenomenon is easy to observe. This kind of bull's eye interferogram is unique to crystals. Med andre ord, once you see such an interferogram, the gemstone being measured can definitely be crystal. Imidlertid, it is important to note that synthetic Mercury also has a bull's-eye interferogram. Derfor, the bull's-eye interferogram can only prove that the measured gem is not glass, but it cannot prove the naturalness of crystal.

Most of the common crystal bracelets on the market are in the shape of a bead, and the interference pattern can be easily observed with the help of a polarizer. Then the interference pattern can not be seen in other shapes of crystal? Of course not, the interferogram should be found in all cambered crystals, but it is very difficult to see the interferogram if it is a faceted crystal. Først, a magnifying glass needs to be added between the gem and the upper polarizer to help converge the light. Sekund, the gem must be in a specific position. Under the polarizer, selv om bull's eye-interferogrammet bare kan observeres i en bestemt vinkel, så lenge det er sett, det kan bestemmes til å være en krystall. Derfor, polarisatoren har stor betydning for identifisering av krystaller.

For tiden, prisen på bærbare polarisatorer på markedet er omtrent to til tre hundre yuan. Hvis du har mange krystaller, eller du er en super fan av krystaller, polarisatorer er fortsatt verdt å investere i. Du kan også gjøre DIY en enkel polarisator med to polariserte linser. Det er ikke slik at polariserte solbriller direkte kan erstatte polariserte glass. Når vi bruker polarisert lys, lysbanen skal først passere gjennom en polarisator, deretter gjennom perlen, deretter gjennom den andre polarisatoren, og til slutt inn i øynene våre. It is impossible to let the light travel along the above path when observing the gem with direct light sunglasses. av.

It is precisely because of the travel route of light that when using a polarizer, you also need to pay extra attention, det er, the measured gem must be transparent (at least translucent). Only when the gemstone transmits light can the light finally reach our eyes. If the gem itself is opaque, no matter how you turn the gem, it will undoubtedly look completely black. Derfor, for opaque gems, polarizers are useless. Imidlertid, crystal does not seem to have to worry about its transparency. Regardless of any type of crystal and all gems that are as transparent as crystal, polarizers are a very useful identification tool.

Endelig, let us summarize how the polarizer distinguishes glass and crystal in one second.

1. Turn on the power and turn the upper polarizer until the field of view is completely black.

2. Place the gem on the lower polarizer and rotate the gem to observe the change in light and shade.

3. If the gem is rotated for four times, or if you see a bull's eye interference pattern, it must be crystal; if the gem is always dark, det er glass.

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