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. Anden, the gem must be in a specific position. Under the polarizer, selvom bull's eye-interferogrammet kun kan observeres i en bestemt vinkel, så længe det ses, det kan bestemmes til at være en krystal. Derfor, polarisatoren har stor betydning for identifikation af krystaller.

På nuværende tidspunkt, prisen på bærbare polarisatorer på markedet er omkring to til tre hundrede yuan. Hvis du har mange krystaller, eller du er super fan af krystaller, polarisatorer er stadig værd at investere i. Du kan også gøre det selv en simpel polarisator med to polariserede linser. Det er ikke sådan, at polariserede solbriller direkte kan erstatte polariserede glas. Når vi bruger polariseret lys, lysets vej skal først passere gennem en polarisator, derefter gennem perlen, derefter gennem den anden polarisator, og endelig ind i vores øjne. It is impossible to let the light travel along the above path when observing the gem with direct light sunglasses. af.

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 glas.

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