White crystal, tea crystal, citrine, ametrine, amethyst in natural crystal can be said to be a type of natural crystal that is often imitated, technically speaking, it is easier to imitate than other crystals, and it is difficult for ordinary consumers to identify whether it is a real natural crystal.
Generally speaking, the color of white crystal after crystal cultivation and radiation is relatively dark, and it is very uniform and transparent. There is no cotton wool or cracks in the crystal, or other impurities, and the imitation natural crystal can only be used as ordinary decoration or industrial needs, and cannot be used as wearable jewelry. Crystal cultivation is done by adding aluminum to change the color during the manufacturing process.
Common crystal imitations
1. Glass imitation, this kind of crystal, at a glance is clear and transparent, has no texture, and has low hardness, single refractive index, the crystal will be mixed with bubbles, it is also very easy to distinguish, and you can also use a polarizer to distinguish whether it is a natural tea crystal or a glass imitation.
2. Plastic imitations, this kind of crystal is easy to identify, can be distinguished from the touch, temperature, hardness of the hand, people who often come into contact with natural crystals, put it in their hands to know the real and fake crystals.
3. Crystal glass products, to put it bluntly, lead glass, glass products with lead metal melted are the most on the market, basically all gift shops are sold; Because the refractive index and dispersion index are good, they appear crystal clear, dazzling, and dazzling, and this type of crystal products are more suitable for placing as decorations, not suitable for wearing, and have no spiritual effect.
4. Smelted crystal, mainland products, like glass, but most of them have been made into balls with a size of seven or eight cm to ten centimeters, which are very beautiful and good-looking, but have a single refractive index and low hardness, which can be distinguished by polarizers.
5. Crystal cultivation, that is, artificial piezoelectric crystal, the rough of crystal cultivation does not have hexagonal crystal crystals, which is the easiest place to judge; But if it is processed and polished into a finished product, it is not easy to judge directly. Here you need to use a UV spectrometer to distinguish between true and false, of course, it is also easy for professional stores or natural crystal lovers to distinguish through the naked eye, practice makes perfect. This type of crystal mainly appears in tea crystal, citrine, amethyst, ametrine and aqua blue crystal.
How to identify the authenticity of crystals
Observation method: The growth process of natural crystal is extremely complex, in the process of formation, it is often affected by the environment, there are always some impurities in the crystal, when observed in the sun or under the light, you can see a faint uniform and fine horizontal stripe or catkins-like substance. The imitation natural crystal is mostly smelted by residual crystal slag and glass slag, and is imitated by processing, polishing, and coloring, and the crystal is often accompanied by bubbles, without uniform stripes and catkins-like substances.
Through feeling: Cool and cool is the sticker of natural crystal, even in the dog days of hot summer, touching the natural crystal with your hands or licking the surface of the natural crystal with your tongue, there is a cool and refreshing feeling. Fake natural crystals do not have a cool feeling.
Lighting effect: Natural crystal can refract magnificent colors and moist textures in the sun. Fake crystals cannot.
Test hardness: natural crystal has high hardness, use crushed stone to scratch the jewelry lightly, no trace will be left; If there are streaks, then most of them are glass crystals or plastic crystal products.
Check with a polarizer: Turning 360 degrees under the polarizer and changing four bright and dark is a natural crystal, and no change is a fake crystal.
Check with dichroism: natural amethyst is dichroic, and false crystal is not dichroic.
Inspect with a magnifying glass: Use a ten-fold magnifying glass to inspect under transmitted light, and those that can find bubbles can basically be considered fake crystals.
Detect with thermal conductivity meter: Adjust the heat conductivity meter to 4 green grids to test gemstones, natural crystals can rise to 2 bars of yellow, while fake crystals do not rise, and rise to one block of yellow when the area is large.
Finally, I would like to remind you that if you encounter a crystal that is difficult to judge the authenticity of the crystal when purchasing, it is best to ask a professional appraisal agency to appraise it.
