Four-category jewellery identification method

Posted by elinaro4oon on October 8th, 2019

Soviet diamond: namely cubic zirconia, which was first developed by the Soviets, hence the name. The Soviet diamond is an artificial compound, but it is very close to natural diamonds in terms of dispersion and refractive index, and it also has a seductive appearance of "fire". But its hardness is low (8.5), which can be distinguished from diamonds. And the thermal conductivity is much lower than that of diamonds photo necklace, which can be identified by “thermal conductivity meter” and accurately distinguished.

Crystal: Although the crystal is a natural mineral transparent crystal, it is diamond-like after processing, but lacks the fancy light of diamonds.

Ruby identification

  Natural gemstones are “nine of ten are cracks”, and natural rubies without any cracks are extremely rare. The artificial ruby ​​has the same color, and the internal defects or crystal inclusions are small, clean, and the size is large. As a precious gemstone, natural rubies over 3 carats on the market are rare. Natural ruby ​​has a strong "dichroic", so-called dichroism, that is, there are two shades of red and orange in different directions. If there is only one color, it may be red spinel, garnet or red glass and so on. Red spinel is very similar to natural ruby, and the two are the most confusing, so they must be especially careful.

Sapphire identification

  Natural sapphires tend to be uneven in color, and most have flat growth patterns. The artificial sapphire has the same color, and its growth pattern is a curved belt, which often shows crumb-like or bead-like bubbles in the body. Natural sapphire also has a distinct dichroism, which is blue in one direction and blue-green in the other. The coloration of other gemstones is different from that of natural sapphires and can be distinguished accordingly. In addition, the easiest method is to use hardness measurement. Natural sapphire can be traced on topaz, while other blue stones are difficult to mark on topaz.

Identification of pearls

  At present, imitation pearls are often found on the market. They are usually made of glass beads coated with fish scale powder or silver powder. The gloss is obviously different from that of real pearls, and the weight is not the same. It can be recognized easily if you have a little experience.

Identifying pearls, there are some experiences in the jewelry industry, as follows:

1 If it is a string of pearls, its color, size, shape, luster, etc. are exactly the same, that is, artificial pearls. Because true pearls can't be consistent anyway.

2 The pearl of the true pearl projection necklace[click] is like a rainbow, full of color and beautiful. Fake pearls are monotonous because of their surface coating, and there is no rainbow color of five colors.

3 The true pearl transparency is good, the fake pearl has poor transparency.

4 Through the feel, the real pearl has a cool feeling, while the fake pearl is often warm and greasy.

5 Observed with a 10x magnifying glass, the surface of the real pearl can see its growth texture, the fake pearl has no growth texture, only the coating

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elinaro4oon
Joined: September 30th, 2019
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