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Anonymous users2024-02-12The line shadow is a natural crystal, if there is no refraction phenomenon, it is still a line shadow, it is not a natural crystal. This method can distinguish between crystal and glass products, but the artificially cultivated recycled crystal will still form a double line and cannot be distinguished.
Magnetic field test method: pinch the two natural spars with the thumb, index finger and middle finger of both hands respectively, and the distance between the two is about at about two times.
centimeters, slowly rotating relative to each other and approaching each other, you can immediately feel a wonderful force similar to magnets attracting and repelling, especially the crystal sphere, which is not the case with unnatural crystals, including synthetic crystals.
Choose crystals that are not easy to imitate.
Such as hair crystal, green ghost, amethyst, there are connotations.
Natural ice cracks.
Clouds and color bands change.
Or prefer a crystal with a slight flaw.
In addition: specific gravity: the weight is too light must be fake, so that glass, plastic, pressed particles and other imitation products can be excluded, but now there are more crystals on the market, and its weight is almost the same as natural crystal, and it is not easy to find the truth or falsehood by hand test.
Refractive index: Most people like to look at crystals under the light, so they can't judge the authenticity of crystals can only look at the grade of crystals, because crystals have a high refractive index. We can put the crystal in a darker place, the color of the natural crystal will be very bright, and the color of the crystal will be relatively dull, lacking the sense of "spirit", only a slight brightness.
You can use natural white crystal and glass to compare and feel.
**: Crystal and natural gem-grade crystals have one thing in common, that is, the crystals are extremely transparent, almost completely without stone patterns, but the price is far apart. However, if he is really a natural gem grade, it must be more than 100 yuan, depending on the size of the crystal.
Chromatic aberration: Natural crystal has color aberration, and a piece of natural crystal cannot be uniform in color in every part, such as citrine, and there are very few natural citrine on the market. Natural citrine can be identified in water, natural citrine in the water its color is uneven, usually a piece of color radiation to the whole crystal is yellow, raising crystals is absolutely uniform.
Others: Cool to the touch, stone-grained crystals will basically not be fake.
Inner inclusions: There will be no fakes if there are inclusions, so you can be absolutely assured of buying crystals with connotations such as hair crystals and ghosts, because the cost of counterfeiting such things is very costly and laborious, and the effect is easy to be seen through.
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Anonymous users2024-02-11Crystal necklaces are one of the most popular gemstone jewelry in the world. It is colorful and crystal clear in the light, which can produce a special "cat's eye" phenomenon. Crystal contains trace elements such as selenium, zinc, aluminum, titanium, etc., they constantly produce photoelectric effects and electromagnetic fields, after processing and grinding, can focus on energy storage, produce brilliance, long-term wear can regulate human body functions, make people energetic, energetic.
However, fake crystals made of glass often appear on the market, and they must be carefully identified when purchasing.
1) Test hardness.
The hardness of crystal is 7 degrees, second only to three minerals such as diamond, corundum, and topaz. Crystals can be used to scratch marks on glass and metal, which is not available in counterfeit products.
2) Test the relative density (specific gravity).
The relative density of crystal is heavier than that of plexiglass (the relative density of glass, the weight of the hand, the feeling is obviously different.
3) Somatosensory.
The crystal is cold and cold to the touch, and at the same low temperature, the crystal is cold to the bone, and licking it with your tongue makes it feel even more cold and piercing; Licking glass fakes doesn't feel the same way.
4) Test high temperature stability.
The crystal melting point is 1713, which is calcined at a high temperature of more than 800 and then put into cold water and still does not burst; Glass counterfeits have no fixed melting point, and they explode immediately when heated to high temperatures and placed in water.
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Anonymous users2024-02-101. Look: natural crystal in the formation process, often affected by the environment always contains some impurities, when observing the sun, you can see a faint uniform fine horizontal stripe or catkins like substance, commonly known as (ice cracking, cotton wool). The fake crystal is mostly smelted with residual crystal slag and glass slag, polished and colored, and there are no uniform stripes and catkins.
2. Check with dicolor: natural amethyst has dichroism, and fake crystal has no dichroism.
3. Check with a magnifying glass: Check with a ten-fold magnifying glass under the transmitted light, and the bubbles that can be found can basically be determined as false crystals.
To add that, crystals have birefringence because they have a regular lattice structure and are anisotropic to light internally. However, glass is an amorphous structure and does not occur birefringence, so the identification of birefringence can only indicate that the material is not a glass product, but not that it must be crystal (or other cheap ore).
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