The first thing to know about crystal is to buy crystal gems that have (1) natural crystalline form and (2) contain inclusions.
Natural powder crystals are mostly opaque, and there are still some inclusions, or cloud-like, crystal-surface extrusion; artificial powder crystals are transparent and flawless, and the angled facets are particularly bright. The raw materials and processing degree of the beads are relatively simple, but because of the large sales volume, the rate of counterfeiting is also the highest. If you see the color is bright, the texture is clear, and the flawless one has to question its true and false.
â— Crystal identification method:
True crystal is a natural crystal. The crystal that naturally occurs in nature often takes more than a million years to produce, so it is rare. Because it is in nature for a long time, it has the energy to store and remember the natural world. It is the so-called absorption of the heaven and earth aura, the essence of the sun and the moon.
Fake crystal is also artificial crystal, because it crystallizes in a human-controlled environment, and its growth rate is very fast. It can be shipped from about 30 to 180 days, and it can be mass-produced, so it is not rare, so there is no energy in nature.
â— How to distinguish the true and false of crystal?
1. Look at the original stone. The natural crystal is a hexagonal crystal system, and the man-made is mostly sheet-like and strip-shaped.
2, natural crystals have some inclusions, some cloud-like, floc-like texture. If the crystal is flawless, the controversy is usually very large.
3. Look at this store is specializing in crystal? Still selling a lot of things? You can see if this store is professional or floral.
4, you can also use the feeling to see if this store treats people with sincerity, trustworthy.
Other points:
Specific gravity: The weight is too light, it must be fake, so it can exclude glass, plastic, pressed particles and other imitation products, but now there are more crystals on the market, and its weight is similar to that of natural crystal. It is not easy to find true and false.
Refractive index: Most people look at crystals like lighting, so it is impossible to judge the true and false of crystals, only the level of crystal, because crystal has a high refractive index. We can put the crystal in a darker place, the natural crystal color will be very bright, the color of the crystal will be dim, lack of pan-feel, only a slight brightness. You can compare it with natural white crystal and glass and feel it.
Price: The crystal and the natural gem-quality crystal have one thing in common, that is, the crystal is very transparent, almost no stone, but the price is very different. Usually, the crystal hand beads will be made into a cutting surface, and the crystal is transparent. However, the price is generally not too high. However, if he is really a natural gem grade, the price must be more than 100 yuan, depending on the size of the crystal.
Chromatic aberration: There is color difference in natural crystal. It is impossible for a piece of natural crystal to be uniform in color. For example, citrine, the natural citrine on the market is rare. Natural citrine can be discerned in water. The color of natural citrine in water is uneven. Usually, a piece of color radiates to the whole piece of crystal, which is yellow. The crystal is absolutely uniform.
Others: The touch is cold, and the crystal with stone is basically not fake.
Inclusions: There are no fakes in the contents, so buying crystals with crystals, ghosts and other connotations can be absolutely assured, because forging such things is costly and laborious, and the effect is easy to be see through.
specific method:
(1) Seeing: In the process of forming natural crystals, it is often affected by the environment and always contains some impurities. When observing the sun, you can see the faint uniform small horizontal stripes or catkins. The fake crystals are often smelted with crystal slag and glass slag. After polishing and coloring, there is no uniform streaks or catkins.
(2) Tongue: Even in the hot summer days, using the tongue to rub the surface of the natural crystal, there is a cold and cool feeling. Fake crystals have no cool feeling.
(3) Illumination: The natural crystal is placed vertically under the sunlight, and it can give off beautiful brilliance from any angle. Fake crystals can't.
(4) Hardness: The hardness of the natural crystal is large. Use the gravel to gently stroke the ornament, leaving no traces; if there are streaks, it is a fake crystal.
(5) Check with a polarizer: 360 degrees under the polarizer is a natural crystal with four dark and four dark changes, and no change is a fake crystal.
(6) Check with two colors: natural amethyst has dichroism, and fake crystal has no dichroism.
(7) Check with a magnifying glass: Under the transmitted light with a ten-fold magnifying glass, the bubble can be found as a fake crystal.
(8) Check with hair silk: Put the crystal on a hair silk, the human eye can see the double shadow of the hair through the crystal, it is natural crystal, mainly because the crystal has birefringence.
(9) Detection by thermal conductivity meter: The thermal conductivity meter is adjusted to the green 4 grid test gems, the natural crystal can rise to the yellow 2 grid, and the fake crystal does not rise, and rises to a yellow grid when the area is large.
Identification of natural and synthetic crystals
Another characteristic of natural crystal and synthetic crystal is crystal luster. The surface of natural crystal jewelry shows oily luster, but the synthetic crystal jewelry table presents glass luster, and there is no synthetic crystal with oily luster.
Crystal, although not a precious gem, is increasingly favored by men, women and children all over the world for its unparalleled medical effects and low price. As a fan of crystal, I hope to have all kinds of crystals, natural or synthetic, but he must know whether his crystal is synthetic or natural.
Nowadays, the colorless crystal necklace and the citrine necklace on the market can be described as natural and synthetic blends, while the color crystal necklaces are mostly synthetic crystals. There are fewer real natural crystals, and fewer are used to make necklaces.
The biggest feature of synthetic crystal is the presence of a daughter crystal nucleus. If the crystal is nucleated, it is better to judge because the crystal is generally a colorless long-plate column, and the boundary with the surrounding synthetic crystal is clear. However, some colorless synthetic crystals on the market recently are colorless due to nucleation and synthesis. In addition, there are some natural inclusion characteristics in the nucleus or some bubbles between the crystal nucleus and the synthetic crystal, which makes some experienced. It is easy for people to mistakenly think that it is a natural crystal. If you look closely, you will find out which kind of inclusions exist only in the child and the main body. There is a feeling that is surrounded by an invisible wall and breaks without delay. The bubbles between the nucleus and the synthetic crystal are distributed along the wall of the nucleus to form parallel "bubble walls". Some of the bubbles are shaped like a scorpion, and the heads are arranged outward toward the wall. Natural crystals often have clusters arranged along one side, but this surface is often single and undulating, and the inclusions that make up the surface are often found to be two inclusions under a gem microscope. Not just bubbles. The difference between the two is still obvious.
The second characteristic of synthetic crystals, especially colored synthetic crystals, is the uniformity of smoke. The color of the whole necklace is more uniform, especially the yellow crystal series and the synthetic crystal of brown and black. The natural yellow and brown, black crystal colors are often not uniform. Natural crystals are not only uneven in color, but also often in tea tones (except for tin crystals). What is more interesting is that under the white light at night, the tea yellow crystal does not have a little yellow color. It is completely like a tin crystal, if it is mixed with tea crystal. Good identification. The synthetic citrine I have seen is pure and uniform in color, with individual shades that are darker, but without tea tones, and will not change color under nighttime white light.
It is worth noting that in the synthetic amethyst, there are often some deep purple patches with good orientation, which are easily reminiscent of the characteristics of irregular swatches in the natural amethyst. The biggest difference between the two is that the deep purple chromophores in the synthetic amethyst crystallize in parallel with the flaky orientation, and the size and shape are not much different. The dark purple tablets are likened to the floating "purple cloth", which is naturally in the amethyst. The purple group can be seen as a floating "purple smoke group". This is the main difference between the two.
Natural crystals, especially amethysts, have a feature that is a hexagonal ribbon like the sapphire. It is interesting to note that in some synthetic green crystals, parallel ribbons often appear, and the ribbons develop parallel to the sub-nucleus in layers. I have also seen a series of synthetic green crystal necklaces, yellow and green countryside, very similar to the natural crystal ribbon, plus some brown translucent solid impurities inside, it is easy to mistakenly think it is natural green crystal, but the formation of synthetic crystal The ribbon is distributed parallel along the wall of the sub-nucleus, and the angle between the objects is flat and the angle of the object is the same. The color spectrum of the necklace is the same, and the color bandwidth of each particle becomes the same, giving an excessive “step-by-stepâ€. Unnatural feeling.
The third characteristic of synthetic crystals is that they are clean and flawless. Natural crystals often have inclusions and cotton, while synthetic crystals are crystal clear. Individual synthetic crystals have bubbles or some solid impurities. Recently, some synthetic crystals often have some triangular long tubular pores in which there are green flaming red powders. The long tube is characterized by parallel arrangement in one direction, the section is triangular, and there are often uneven green fire red powder distributed along the wall, the middle is often empty, and the end of the long tube has a tendency to become sharp. The true natural hair crystal is a crystal containing minerals such as tourmaline, actinolite, rutile, etc. These minerals have a gas crystal shape, such as the "bamboo-like" shape of the amphoteric stone. They are wrapped in crystals, arranged in a non-directional manner, thick and slender, short and different, often accompanied by inclusions and cotton inherent in natural crystal.
The fake crystals on the market generally have the following types:
1, glass products; 2, smelting crystal; 3, lead-containing glass; 4, synthetic crystal; 5, regenerated crystal (nutrients).
Identify the true and false of the crystal with a simple polarizer. It consists of two polarizing plates consisting of upper and lower polarizing plates, which can distinguish between glass and crystal. Since the glass is a homogeneous body, put it in the middle of the refracting sheet holder. If you turn it anyway, the fake crystal will always be black; if it rotates 360 degrees in the middle of the refracting sheet holder, there will be four regular changes in light and dark light. Crystal is undoubted.
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