The following are some of the most practical methods to distinguish between true and false crystals, among which the third and fourth methods are especially suitable:
temperature
In general, the temperature in the crystal is lower than that of other gems. Touching with the palm of your hand or cheek will make you feel cold (if you put it in the counter for a long time and there is light, it is difficult to tell, because the heat of the lamp tube will lead to the increase of crystal temperature). This method is mainly used for larger crystal balls or crystal rods, because too small crystals (bracelets or pendants) are relatively difficult to feel the temperature difference, but there is still a big difference.
weight
Crystal stone is a kind of stone with high density and light weight. When you buy a crystal, weigh it in your hand. It is found that the lighter one is likely to be a fake crystal made of glass or plastic. At present, the weight of crystals made by the method of "growing crystals" is very close to that of rock crystals, so it is difficult for ordinary people to distinguish between true and false. Only by observing other aspects, such as "inclusion" and refractive index, can we judge whether it is true or not.
Internal inclusion
Any rock crystal has inclusions (that is, minerals or bubbles), only in the type and size of inclusions. These inclusions are more or less visible to the naked eye. If you see crystal clear, but you can't see any inclusions at all, be careful. This may be a fake crystal made of glass. I believe that if you want to buy such a rare rock crystal, you must use appropriate instruments to identify it before you can pay. Even crystal crystals must have inclusions, which must be seen with a professional microscope. Generally speaking, this method is the most practical.
quality
No matter how good the color of rock crystals is, there will be inclusions more or less, such as filiform, flaky and granular. And the stereoscopic effect is very obvious. For the color is quite good, you need to use special instruments or be tested and identified by the quality supervision department; Moreover, the same bracelets or necklaces are rare (except white crystals and tea crystals, because these two crystals have large output and good color, but special attention should be paid to glass imitation). However, fake crystals do not have these characteristics, and their inclusions are mostly flat, round or oval bubbles. With a magnifying glass combination of 10 +20 times, we can see that their surfaces are wavy. At the same time, special attention should be paid to fake real crystals, that is to say, two real crystals are bonded together with a very good pattern in the middle. This identification method is to pay attention to whether the inner bag is flat or not, whether there is a three-dimensional sense, whether there is a seam at the edge, and carefully observe whether there are any sticky marks inside.
How to choose crystal products
First look at the material selection.
For crystal products with excellent materials, there should be no gas-liquid inclusions in the form of stars, clouds and flocs. The texture is pure, smooth and crystal clear. If cracks and spots of different shades are found, they are defective.
Second, look at the works.
The processing of crystal products can be divided into two types, namely grinders and engravers. Such as crystal necklaces, bracelets, earrings, etc. Belonging to abrasive products; Guanyin statue, painted snuff bottle, etc. It belongs to sculpture. A well-made crystal product should be exquisite, which can fully show the external beauty (shape, style, symmetry, etc. ) crystal products, but also to maximize its inner beauty (crystal clear, smart color).
Third, look at polishing.
The quality of polishing directly affects the value of crystal products. The crystal must be polished with emery during processing, and rough production will make the crystal surface have friction marks. Good crystal products have good natural transparency and luster, which is "burning with fire" in the local dialect.
Fourth, look at the eye hole.
Crystal products (such as necklaces, bracelets and beads) depend on whether the holes are straight, whether the thickness of the holes is symmetrical and whether there are small cracks. The hole wall must be clear and transparent without "white spots".
Fifth, look at the color.
Even the same crystal has different textures and colors in different parts. It belongs to monochrome, and the chromaticity should be uniform; If there are tones on the same crystal, it is required that the tone lines are beautiful and generous.
Sixth, look at coordination.
When buying crystal ornaments, try them on to see the size, tightness and length. If it is inlaid ornaments, see if it is firm, straight and harmonious. You should also pay attention to whether the style and color of crystal ornaments are in harmony with your figure, skin color, face shape and clothing.
Seven, by feeling:
Crystal and people also have a certain fate. As the saying goes, "a thousand dollars can't buy a good heart." Only the rock crystal that loves the eyes and the sixth sense will accompany you for a lifetime, even if there are such shortcomings. Therefore, it is a good way to let your first impression or intuition decide to choose the right crystal for you.
Characteristics of false crystals
When crystal became popular, there were many counterfeit products on the market, which not only troubled consumers, but also puzzled many stores themselves because they were not professional enough!
The following forgeries appeared:
1, acrylic, plastic products: it can be distinguished from handle, temperature and hardness. In addition, acrylic and plastic are easy to cause light distortion and refraction, which is generally not difficult to distinguish, so such counterfeit products are becoming scarce.
2, glass products, this kind of sight is clear as water, has no texture, and has low hardness, single refractive index, mixed with bubbles, and is easy to distinguish.
3, fused crystals, like glass, but many have been made into seven, eight centimeters to ten centimeters, very beautiful, but the refractive index is single, the hardness is low, you can use a polarizer, or measure whether the hair has changed two.
4. Crystal glass is actually "lead glass". The most popular glass products in the market are those with lead metal. Because of its good refractive index and dispersion rate, it is dazzling and dazzling. It is most suitable for decoration and decoration, but not for spiritual use. Generally, it can be distinguished by vision.
5. Artificial crystal, also called "crystal cultivation", the original stone has no hexagonal crystal system, which is the easiest place to judge; But if it is ground into a finished product, it is not easy to distinguish it by the above method, and it is necessary to use an "ultraviolet spectrometer" to distinguish between true and false.
The most common products on the market are colorless and transparent white crystal, amethyst, topaz and aquamarine crystal fakes. I suggest that friends, when encountering controversial crystal ore, it is best to send it to an impartial third party, such as an appraisal office, for identification. It doesn't cost much, but it has professional guarantee. If necessary, even send it to more than two appraisal institutes for appraisal. It's best to choose "original stone" and look at its crystal form, growth line and primary minerals. It can't be wrong. In addition, it is to buy crystal ore containing "impurities", which is wrongly called impurities and defects by ordinary people. This is the best proof of "growing in nature"
Finally, I remind you that finding a professional store is the most secure. Roadside vendors and vendors lack professional knowledge and are easy to run. Even the counters in department stores are not necessarily professional, and crystal and crystal glass are often confused, which is difficult to predict. Appreciate special optical effects. If the crystals are wrapped in cracks and air, some will form a "rainbow" under the light. For example, there is a heart-shaped rainbow on the left side of the Emerald Hills. Some mineral inclusions in crystals have bright metallic luster, and the most common ones are all kinds of hair crystals, among which golden hair crystals are the most eye-catching; The hair crystals in some crystals are arranged according to special patterns, and after polishing, cat's eye effect or starlight effect can also appear. Such as "golden hair crystal six-shooting star light ball"
For many crystal lovers at present, it is worth mentioning that a good crystal ornamental stone is a work of art of nature. Instead of buying a pile of cheap garbage, it is better to buy an expensive boutique, because "boutique" not only has high appreciation and collection value, but also has high "energy" Owning a boutique can even give you a sense of pride. Whether you can get the best products is related to your luck, knowledge, cultivation and vision. Before buying a crystal, you should read it carefully, because different people or watching the same crystal at different times can have different discoveries, feelings and inspirations, and the value of a crystal can be reflected to some extent through people's discovery and understanding of its content.
This is crystal, but I don't know about silver. pity ...
References:
I forgot where it came from. pity ...
Responder: Ye Xin-Magician Level 4 3-28 08:45
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Identification method of true and false crystals
(1) At first glance, rock crystals are often influenced by the environment and always contain some impurities. When you look at the sun, you can see faint or even tiny stripes or catkins. However, fake crystals are mostly made of inferior crystal slag and glass slag, which are melted, polished and colored, without uniform stripes and catkin-like substances.
(2) Lick your tongue: Even in the dog days of hot summer, licking the surface of the crystal stone with your tongue will feel cold and cool. Fake crystals are not cool.
(3) Illumination: When the crystal is placed vertically in the sun, it can emit beautiful light from any angle. Fake crystals can't.
(4) Hardness: The hardness of the crystal is very high, and it will leave no trace when lightly scratched with gravel on the jewelry; If there are streaks, it is a fake crystal.
(5) Inspection with a polarizer: the rock crystal rotates 360 degrees under the polarizer, with four bright and four dark changes, while the fake crystal does not change.
(6) Check with dichroism: natural amethyst has dichroism, while fake amethyst has no dichroism.
(7) Magnifier inspection: under the transmitted light, the bubbles that can be found can be basically classified as pseudocrystals.
(8) Test with a thermal conductivity meter: set the thermal conductivity meter to 4 squares of green to test the gem, and the rock crystal can rise to 2 squares of yellow, while the false crystal does not rise, and when the area is large, it will rise to 1 square yellow.