Stone crystals are not as crystal clear as glass in many cases, but some kinds of crystals, such as white and brown. When the crystal is not very big, it will be crystal clear.
Fake crystals are mostly made of inferior crystal slag and glass slag. After polishing, coloring and imitation, there are no uniform stripes and catkin-like substances. ? Obviously there is something wrong with this sentence. The most common molten crystals on the market (synthetic materials that fuse crystal residues together) have many uniform stripes and catkin-like substances.
Melted crystal
(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.
This article can never be used as a standard, nor is it hygienic. I wonder how many people touch a bracelet every day. How many people will try it on and lick it when they come up? Because in dog days, the natural crystal will become slightly warmer because of the high temperature, and the tongue will never feel cold when licking; At other times, the temperature difference between glass and crystal is not obvious.
It is also said that as long as it is on the crystal belt, it will always be cool and even cold. For friends who are new to crystal, this is the most practical way to identify crystal. In fact, the real crystal can't keep constant temperature and cool all the time like a refrigerator. If crystal can really do that, I think every family can buy a bigger crystal ornament as an air conditioner, and every family can buy a crystal as a bed, which is electricity-saving, economical and environmentally friendly, and can directly eliminate air conditioners.
Will say that the crystal gets cold when you get it. You've never been to the store to buy crystals. Just like the crystal we put in the counter, the counter light is direct every day, and the temperature inside is not measured. Anyway, the small wine glasses put in (careful friends should be able to find that most physical stores and jewelry counters will put several small wine glasses at the same time, which contain some liquid. It's not really mysterious. That liquid is water. The main purpose is to increase the humidity around jewelry, and the other is to prevent jewelry from being exposed to direct light from the counter? Deterioration? Let's call it deterioration. What's the official name? Running water? . You have to add water once a week. Think about the temperature. Can the crystal bracelet be cool when it is taken out?
(3) Illumination: When the crystal is placed vertically in the sun, it can emit beautiful light from any angle. Fake crystals can't.
The explanation of this article is very vague, emitting beautiful light color-the technical term should be fire color. Only some Swarovski and its imitations can do it, but that's high lead glass. Rock crystal, as long as it is not polished by special grinding surface, it is impossible to achieve the effect of fire color. Even the crystal containing rainbow inclusions can only shine at a certain angle, which is far from the effect of fire color.
Only this kind of imitation crystal made of lead glass will? Shiny?
(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.
What do you mean by gravel here? If you accidentally get the gravel of the diamond, or the gravel with the same hardness as the tested crystal, it will be ... The crystal jewelry is polished and polished, and its appearance is very smooth, which is not the same as the original stone, and it is easy to be scratched (like the current Apple 7, which has bright black and matte black, and it is obviously easy to be scratched when it is bright black. Speaking of which, I also want to give a suggestion to my friends who haven't bought i7. If you want to buy the black series, you can easily buy it. Scratch-resistant, with fingerprints on it. Take it and you'll have a big face. At that time, Xiao Zuo didn't look at the prototype, but looked at the picture and felt noble. Actually, matte black is really nice. It is recommended that you do not take the risk of using this method for identification.
(5) Inspection with a polarizer: the rock crystal turns 360 degrees under the polarizer and has four bright and four dark changes, while the fake crystal has no change.
Artificial crystal can also do this! ! This article can only distinguish between crystal and glass, not between nature and man-made.
Artificial topaz
(6) Check with dichroism: natural amethyst has dichroism, while fake amethyst has no dichroism.
Ok ... how many people know what dichroism is? Not to mention how to measure it, it is better to send it directly to the appraisal.
(7) Magnifier inspection: under the transmitted light, the bubbles that can be found can be basically classified as pseudocrystals.
Many bubbles in the crystal stone are wrapped in a water-encapsulated crystal. The bubbles are so big that you can see them without a magnifying glass.
(8) Check with hair: If the crystal is placed on a hair, the human eye can see the double shadow of the hair through the crystal, it is a rock crystal, mainly because the crystal has birefringence.
Crystal does have birefringence, but to see hair double shadow, two conditions must be met. One is that the crystal is transparent, and the other is that the crystal has a certain size, which can be seen in a transparent crystal ball of about 4cm. This method can judge the authenticity of a crystal ball, but bracelets and the like are impossible.
(9) 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.
Professional requirements are relatively high, and hardware equipment is definitely not available. It is better to go directly to the appraisal agency!