Many people like crystal, the identification method of crystal is also varied. The following are some of the crystal identification methods and techniques summarized, I hope to help you buy crystal.
1, touch method:
Crystals are crystals, heat transfer is fast, glass is amorphous, and heat transfer is slow. So holding the crystal will feel cold and cool, after a short while, it will be in sync with body temperature; while glass has a warm feeling.
2. Observation of inclusions:
Observed with 20 times jewel magnifying glass: crystals often contain natural gas-liquid inclusions, flocs, symbiotic minerals, ice cracks, cracks, etc., and flawless crystals are mostly problematic. There are often swirling fine lines on the surface and inside of the glass, much like the phenomenon of uneven mixing after pouring honey into clear water. In addition, regarding the problem of bubbles, there is a saying that the general inclusion of bubbles is classified as glass, which is very imprecise. First of all, natural crystals may contain bubbles, which are natural gas liquids mixed in the process of crystal growth. The bubbles are tiny and dense, and have a moist feeling, like the mist in the stone, and the distribution is good, such as clouds and fog, which is aesthetically pleasing (such as inclusions). To form an image, it is a vision crystal, such as a white ghost, etc.). Inferior glass is indeed easy to contain bubbles, irregular in shape and arrangement, feels abrupt, and lacks a sense of unity. However, from a realistic point of view, the glass used to counterfeit crystals is often well-made and not so bad.
3, fracture identification:
The shape of the glass fracture is familiar to everyone. It is a slant that is smooth and curved like a shell. The crystal is an ore. The stone is visible at the fracture, and the crystal is a crystal. The cross section does not have traces like glass.
4, the process:
The more precious the precious stones, the more polished they are, such as the cutting of diamonds, has become an art. Glass fake gemstones are inexpensive, so the grinding is rough, the surface is not smooth, the cross between the facets is not straight, and the holes are not refined - especially this hole, the glass is brittle, the holes are easily broken, just for the fracture Observed.
5, optical identification:
The glass is a homogeneous body that does not crystallize. The crystal is a crystalline heterogeneous body. When it is rotated 360 degrees under a polarizer, it seems that the natural crystal is like a dark change, and the crystal is unchanged. In addition, some natural crystals such as amethyst have dichroism, while pseudocrystals do not.
6, hardness distinction:
The hardness of the crystal is 7, and the glass is usually about 5.5. Therefore, when the crystal is scribed, the crystal has no trace of the glass. (If you are willing, try on the glass with the less obvious parts of the jewelry.) Tips: The hardness test is only for the gems of the crystal family. Do not use this method to identify the baby of the non-crystal family, like honey wax, coral, cockroach, Organic gems such as pearls, or jadeites such as jade. In addition, from the perspective of gemology, hardness and brittleness are two concepts, which means that the hardness does not mean that the fall is not bad. Therefore, before the identification, you must first find out the specific physical properties of your baby, and do not be too savage when wearing it. .
7, hair identification (birefringence):
Hair identification is specifically for spherical crystals: put the crystal on a hair and gently rotate the spar. When turning to a certain direction, double shadow appears, that is, one hair becomes two, the effect is clear and obvious, this is The phenomenon of birefringence caused by the crystal arrangement of natural crystals cannot be obtained by pseudocrystals. The more obvious the double-shadow effect, the better the crystal quality. Some natural crystals with too many impurities may not be double-folded, or the phenomenon of hair twisting, straight line breaking, etc., the quality of such spar is worse.
8, thermal conductivity testing:
Adjust the thermal conductivity meter to the green 4 grid test gems. The natural crystal can rise to 2 squares in yellow. When the area is large, it rises to a yellow grid, and the fake crystal does not rise.
9, physical experience:
As crystals of quartz crystals, energy vibration and magnetic field effects are their most obvious features. This is also the secret of crystals with different medical effects, so use your body and mind to feel.
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