How to tell whether a crystal is true or false?

question 1: how to distinguish between true and false crystals

temperature: under normal environment, the temperature in rock crystal is lower than that of other gems. You will feel slightly cold when you touch it with your palm or cheek. This method of defecation is only suitable for larger crystal balls or rods, because too small crystals such as crystal hands? Or the pendant is difficult to feel the temperature difference.

weight: rock crystal is a stone substance with high density, and its weight will not be heavy. When you buy a crystal, put it on your hand and weigh it. It is found that there is a great chance that the relatively light one is a fake crystal made of glass or plastic. At present, the weight of the crystal made by the method of "growing crystal" is very close to that of rock crystal, so it is not easy for ordinary people to separate it. Only by merging and observing other aspects, such as whether there are "inclusions" and refractive index, can we distinguish whether it is true or not.

refraction: rock crystal will have birefringence. Put a black line on white cloth or white paper, and put the crystal on the table. Looking through the crystal, the black line will be refracted into two balanced or overlapping black lines. If you can't see birefringence, there is a great chance that this is a fake crystal made of glass. But this method is only suitable for distinguishing the difference between glass and rock crystal. Nowadays, crystals made by "growing crystals" also have refractive index. This method is also not suitable for distinguishing the authenticity of a white crystal ball, because the refractive index of a white crystal ball is not high, and it may not be accurate to identify it by this method.

energy: true crystal can emit energy. When buying a crystal column, pick it up with one hand and point the tip of the column at the palm of the other hand, with a distance of 2 to 3? Should the nail be closed or not? Circle slowly. The palm can feel the energy emitted by the crystal column shooting at the palm, and the feeling is obvious. Of course, a small number of people have a weak sense of energy in the crystal, and they failed to sense its energy when they first came into contact with the crystal. This method is not applicable. But if you can feel the energy from the crystal in this way, you can be sure that what you have is the real rock crystal.

Inclusions: Any rock crystal has "inclusions" (i.e. 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, you can't see any "inclusions", so be careful. It may be a fake crystal made of glass. I believe that if you want to buy such a rare rock crystal, you must pay for it by proper instrument appraisal. A crystal that is extremely crystal clear must be "included" and can be seen by a professional microscope.

(1) At first glance, rock crystal is often influenced by the environment and always contains some impurities. When looking at the sun, you can see light, even and fine stripes or catkins. However, fake crystals are mostly made of inferior crystal slag and glass slag, which are polished and colored and imitated, without uniform stripes and catkin-like substances.

(2) Tongue licking: Even in the dog days of hot summer, licking the surface of rock crystal with your tongue will feel cold and cool. Fake crystals have no cool feeling.

(3) Illumination: rock crystal stands upright in the sunlight, and no matter which angle you look at it, it can emit beautiful light. Fake crystals cannot.

(4) Hardness: rock crystal has a high hardness, so you can lightly scratch the jewelry with gravel without leaving any trace; If there are streaks, it is a fake crystal.

(5) Check with a polarizer: rock crystal has four bright and four dark changes when rotating 36 degrees under the polarizer, but the fake crystal has not changed.

(6) Check with dichroism: natural amethyst has dichroism, while fake amethyst has no dichroism.

(7) Examining with a magnifying glass: Examining with a ten-fold magnifying glass under transmitted light, the bubbles that can be found can basically be classified as fake crystals.

(8) Check with hair strand: If the crystal is placed on a hair strand, the human eye can see the double shadow of the hair strand through the crystal, which is rock crystal, mainly because the crystal has birefringence.

(9) Testing with a thermal conductivity meter: Adjust 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 rises to 1 square of yellow acume.ws/CRYSTAL/web_c/Mainpage2....

question 2: how to tell the authenticity of a crystal? The easiest way is to take a bowl (made of plastic), connect it with water and put the crystal into the water. Then put it in the refrigerator until it turns into ice. After freezing into ice, take the ice out of the bowl. At this time, the crystal has been frozen into the ice. Boil another pot of water and put the ice in. Principle: If it is a real crystal, it is not afraid of such a wide temperature difference. On the contrary, it is false. The fake crystal will immediately disintegrate and fall apart. The method is taught to you, depending on whether you are willing to do it or not. Non-destructive method to identify crystal and glass

1. Wipe or wash the artwork to be identified, and after drying, touch the artwork with the tip of your tongue. If it feels cold, it is a crystal product; if it feels warm, it is a glass product. During the test, try not to hold the sample by hand or put it near a heat source (in the sun, by the fire) to avoid mistakes caused by the increase of the sample temperature.

2. observing the artworks with a magnifying glass, there are often vortex-like or arc-shaped lines in the glass due to uneven melting, but there are absolutely no lines in the crystal. In addition, there are often many bubbles in glass, but few in crystal.

3. For the crystal ball, you can put it on the newspaper and look at the newspaper below from the top of the crystal ball. If it is a real crystal, the handwriting on the newspaper will appear double. If it is made of glass (including crystal glass), there will always be only one image of the handwriting in the newspaper. To be accurate, you can roll the sphere slightly in the newspaper and observe it again.

4. For crystal glasses, you can check them in a polarizer. Adjust the polarizer to the orthogonal position, and the field of vision will be completely black at this time. Then, put the crystal glasses between the upper and lower polarizers. The lenses and polarizers are not strictly parallel, but can be slightly tilted to make the lenses and polarizers have an intersection angle, and then rotate the glasses. If it is made of real crystal, there will be obvious brightness change in the field of vision. If it is always dark when rotating, then this spectacle lens is made of glass or crystal glass (glass made of inferior crystal).

5. When traveling abroad, the polarizer is inconvenient to carry, so you can bring two polarizers (or the two smallest polarizers for photography) with a diameter less than 4 mm. When measuring, one person holds two polarizers to make them orthogonal and completely black, and the other person holds glasses and rotates them between the two polarizers. If there is a significant brightness change, it is a real crystal product, and if the darkness remains unchanged, it is a glass product.

crystal products are easily confused with glass products, especially under the illumination of light, it is more difficult to distinguish authenticity. However, as two different materials, they are quite different. Glass has low hardness and light hand feel, and will not reveal color under the irradiation of light.

To distinguish between crystal and glass, we mainly rely on the following four points:

First, listen to the sound to distinguish things. When the utensils are struck by hand, the sound of crystal products is crisp and lingering, while the sound of glass products is dull and unresponsive.

second, "weight" is different. For two items of the same size, crystal products are heavier than glass products.

third, look closely at the refraction. In the same light, the refractive index of crystal products will be better than that of glass products, and colorful light will be revealed, but glass products will not have colored light.

fourth, the hardness is different. The hardness of crystal is greater than that of glass. When you scratch glass with crystal, you will leave traces on the surface of glass, but when you scratch crystal with glass, there are no traces. What is the difference between rock crystal and synthetic crystal? There are too many fakes between amethyst and topaz. One characteristic that distinguishes rock crystal from synthetic crystal is crystal luster. The surface of rock crystal jewelry presents grease luster, but the surface of synthetic crystal jewelry presents glass luster. There is no synthetic crystal with grease luster yet.

Crystal, though not a precious gem, is more and more loved by men, women and children all over the world because of its unparalleled medical effect and low price. As a crystal lover, everyone wants to have all kinds of crystals, whether natural or synthetic, but he must want to know whether his crystal is synthetic or natural.

At present, colorless crystal necklaces and tea crystal necklaces on the market can be described as natural and synthetic, while colored crystal necklaces are mostly synthetic crystals. There are fewer real natural colored crystals, and even fewer are used to make necklaces.

the biggest feature of synthetic crystal is that it has a daughter crystal nucleus. Synthetic crystals are easier to judge if they have crystal nuclei, because crystals and generally colorless long plate columns have clear boundaries with surrounding synthetic crystals. Recently, however, some colorless synthetic crystals on the market are colorless in crystal nucleus and synthesis, and there are some natural inclusion features in the crystal nucleus or some bubbles between the crystal nucleus and synthetic crystals, which makes some experienced people easily mistake them for rock crystal. If you look closely, you will find that what kind of inclusions only exist in the child and the host, and there is a feeling of being stopped by an invisible wall around them. Between crystal nucleus and synthetic crystal > >

question 3: how to tell the true crystal from the false crystal? Distinguishing crystal mainly depends on the difference between crystal and glass

First of all, it is about the difference between crystal and glass products.

crystal: birefringence, hardness 7, cool to the touch.

glass products: no refraction phenomenon, hardness of 5-6, warm to the touch.

the brightness of crystal is different at every angle, and that of glass is the same at every angle; Scratch the glass with crystal, there are scratches on the glass, and the traces can't be erased, and the crystal is not damaged; Scratch the crystal with glass, there are slight scratches on the crystal, but it will be wiped away and the glass will be damaged; In the same environment, the cold feeling of holding the crystal lasts for a long time, but holding the glass will feel warm and the heat transfer speed is fast!

Nine winning ways to identify genuine and fake crystals: (This way, you won't be afraid to buy fakes any more. . . )

1. Seeing: When you look at the sun with a crystal, you can see a faint and even small horizontal stripe or catkin-like substance. Fake ones are mostly made of inferior crystal slag and glass slag, which are polished, colored and imitated, and there is no uniform substance.

2. Tongue licking: Even in hot summer, licking the surface of the crystal with your tongue will feel cold and cool; On the contrary, it is fake!

3. Illumination: When the crystal is placed upright in the sun, beautiful colors will be released from any angle, with different brightness; On the contrary, it is a fake!

4. Hardness: lightly scratch the crystal with gravel, leaving no trace; (Obsidian is less hard and must be excluded, otherwise your obsidian will be hurt, so it's not mine, hehe) Otherwise it's fake!

5. check with a polarizer: turn 36 degrees under the mirror, and there are four bright and four dark changes that are true crystals!

6. Check with "dichroism": rock crystal has "dichroism"!

7. check with a magnifying glass: check with a ten-fold magnifying glass under transmitted light, and you can find that the bubble is true or false! (Pay special attention, if you just observe with the naked eye, you will see that DD in your hand contains small bubbles. Hey, hey, don't buy it! )

8. Check with hair strand: the crystal is placed on a hair strand, and people can see the double shadow of the hair strand through the crystal! (Because of the birefringence of crystal) On the contrary, it is false!

9. Check with a thermal conductivity meter: adjust it to 4 squares of green to test the gem, and rock crystal will rise to 2 squares of yellow, and 1 square of yellow when the area is large.

Crystal is a kind of gem that people like very much. In ancient times, it was called "water essence", that is, the essence of water, and it was also called "water jade", "white attachment" and "jade crystal". Aristotle, a famous ancient Greek philosopher, also believed that crystals evolved from ice. In fact, crystal is the crystal of silicon dioxide (SiO2), which has no internal connection with water or ice. It is usually colorless and transparent, but it can have different colors when it contains iron-containing elements, such as purple, yellow, smoky gray and so on. When the crystal contains fibers or needle-like minerals arranged in a certain direction, it can be processed into "eye hunting crystal" or "starlight crystal" or "hair crystal", and if it contains water inclusions, it may become "water gallbladder crystal".

crystal and glass are very similar in appearance, but they are two completely different substances. The main differences are as follows:

1.

Crystal with different materials is the crystal of silicon dioxide, while glass is only a mixture containing silicon dioxide in the molten state.

two. Different efficacy

Glass only has decorative function, while crystal has piezoelectric effect besides decorative function, which has special health care function.

three. Different prices

The unit price of crystal is several times or even dozens of times higher than that of glass.

four. Physical properties are different

1. Crystal is a crystal with high hardness (Mohs 7), while the hardness of glass is low (Mohs 5.5). Crystal can draw traces on glass, but not vice versa.

2。 Crystal is a crystal with good thermal conductivity, and it feels cold when touched with the tip of the tongue. And the glass looks warm.

3。 With a polarizer, crystal can transmit light, but glass can't.

We can distinguish crystal and glass conveniently according to their different physical properties.

five. Different processing techniques

Glass can be hot-cast, which saves material and labor and has low cost.

Crystal is a crystal, which can't be reversed after being melted by heating, so it can't be molded by hot casting, but only by cold working methods such as cutting and grinding. Material and labor are wasted and the cost is high.

the crystal has high hardness and is not easy to wear. Glass has low hardness and is easy to scratch.

the crystal has good stability and will not change color after long-term use. While glass turns yellow easily.

Crystal is not isotropic body, and glass is isotropic body. (That is, crystal ... >; >

question 4: how to tell whether a crystal is true or false? The following are the ways to distinguish the true from the false:

(1) At first sight: rock crystal always contains some impurities due to the influence of the environment during its formation. When looking at the sun, you can see faint even and tiny striations or catkin-like substances. However, fake crystals are mostly made of inferior crystal slag and glass slag, which are polished and colored and imitated, without uniform stripes and catkin-like substances.

(2) Tongue licking: Even in the dog days of hot summer, licking the surface of rock crystal with your tongue will feel cold and cool. Fake crystals have no cool feeling.

(3) Illumination: rock crystal is placed vertically in the sunlight, and it can emit beautiful light from any angle. Fake crystals cannot.

(4) Hardness: rock crystal has a high hardness, so you can lightly scratch the jewelry with gravel without leaving any traces; If there are streaks, it is a fake crystal.

(5) Check with a polarizer: when rotated 36 degrees under the polarizer, it is rock crystal who has four bright and four dark changes, but it is false crystal that has not changed.

[6] Check with dichroism: natural amethyst has dichroism, while fake amethyst has no dichroism.

⑺ inspection with a magnifying glass: inspection with a magnifying glass of ten times under transmitted light can