A magnifying glass is enough for jewelry identification!
You don't have high-end equipment, nor are you a senior expert. When you see a gem you like, you can't identify it, you can only watch it go away silently? How does that work! The author wants to tell you: Sometimes the identification evidence of a gem is hidden in its own body, as long as you understand its details and secrets, you have no high-end equipment, nor are you a senior expert. Is it going away? How does that work! The author wants to tell you: Sometimes the identification evidence of a gem is hidden in itself, as long as you know its details and secrets, you can also identify it! Let's take a look at how the jewelry appraisal can see the difference with a magnifying glass. First look at a picture: In this picture, one is a real diamond, and the other is the most feared diamond imitation: synthetic silicon carbide. The most trusted and widely used diamond identification instrument thermal conductivity meter cannot distinguish them. The author of tells you a little secret, in fact, the two can be distinguished with the naked eye, which is the'killer's birefringence' taught you today. 1 minute to understand birefringence 1. What is birefringence? If you go to check, it will give you the answer: a light beam incident on an anisotropic crystal is broken down into two beams of light and refracted in different directions. Author's illustration: is something more easy to understand. You can write a line of words on the paper, and then put your beloved gem on it, look through the gem, the word is likely to become a double shadow, this is double The result of refraction. Just like this ↓ has a very high birefringence iceland stone 2, not all gems have birefringence This is determined by the internal structure of the gem itself. In layman's terms, if the internal structure of the gemstone is not uniform, the refractive index of light entering from different directions will be different, so birefringence occurs. The greater the difference between the maximum refractive index and the minimum refractive index, the more obvious the birefringence will be. ! And if the inside of the gem is completely uniform, there will be no birefringence. Of course, please note that the uniform structure referred to here is not an ordinary texture and density, but the microstructure inside the gem. 3, a small step to understand the birefringence What kind of behavior will a gemstone with birefringence behave? If it is a faceted gem, the simplest and most straightforward thing is that you can see the ghost of its faceted edges, that is, the edges that intersect the opposite facets of the gem are double-lined or have ghosting. The greater the birefringence of the gem, the more obvious the faceted edge ghost, and some can even be observed without a magnifying glass! ENZO Green Tourmaline 18K Gold Earrings Step 1. A good tool is half the battle. Before observing the facet ghosting of gems, you only need to prepare a 10x magnifying glass. This magnifying glass is very easy to carry and is the clearest for gem observation . However, please note that only faceted gems can see faceted edge ghosting, but not arcs. Step 2. Make no mistakes about the angle~ The biggest skill in observing the ghosting of faceted edges of a gem is the choice of angle. If you choose the wrong direction, you will not even see any features, and the oblique side of the gem crown is the best Observation angle. You can observe the facet at the bottom of the gem from this direction through a 10x magnifying glass. Step 3. How can I tell if I have seen faceted ghosting? If it is found that all the edges of the facet at the bottom of the gem have become double lines, like a photo that is blurred due to movement, then the gem is a birefringent gem. Come and test the synthetic diamond VS diamond. Left: The facet edge ghost of synthetic diamond is very obvious. Right: Single-refraction diamond facet edge is very clear and sharp. Synthetic silicon carbide has a very high birefringence. You can clearly see its faceted edge ghosting, which breaks the identification problem in one move. In addition, birefringence is simply too useful in distinguishing gems from imitations and similar gems. Many glass imitations can also be distinguished by birefringence. Peridot VS Tsavorite/Demantoid. Left: Peridot is a representative of high birefringence gemstones. You can clearly see the multi-faceted ghosting through the countertop. Right: Tsavorite, Demantoid, etc. belong to the garnet family , Is a single-refraction gemstone, without facet ghosting. Above is the author's summary for you about jewelry identification information. The information comes from the Internet. If there is anything wrong, please understand. If you need jewelry identification, please visit the official website of jewelry setting, jewelry Mosaic will serve you wholeheartedly!
