1. Three instruments can be used to identify dyed jadeite: 1) Charles filter. Under the observation of Charles filter, the green color of dyed jadeite appears pink or red. 2) Infrared spectrum analyzer. Infrared spectrum analysis shows that the red area of dyed jadeite presents a wide absorption band. 3) High power microscope.
2. Spectrophotometer Spectrophotometer can directly see the obvious absorption lines (bands) and fluorescence spectra of various gems by using visible light spectroscope. Spectrophotometers include ultraviolet-visible spectrophotometer and infrared spectrophotometer.
I studied gem identification in England. For jadeite, the most important instruments are flashlight and magnifying glass. My grandfather is a celebrity in Yunnan jade industry. He usually only carries a magnifying glass 10 times. After all, the place he sells is full of lights. Buy the flashlight in the tungsten lamp, which is slightly yellow.
How to identify jadeite
We can listen to the sound of jade, such as jade bracelets. First tie the jade bracelet with thin thread and hang it in the air, then tap it with something like a glass rod. The sound of natural jadeite is crisp; The sound made by fake jadeite is dull and not crisp enough.
According to the color, density, smoothness and convexity of the epidermis, we can roughly estimate the internal color of jadeite raw materials, the quality of water head, the quality of land, the old and tender types and the number of cracks.
In fact, if you want to identify the jade A goods, you must first know what the jade A goods are like, what are their characteristics and what are their characteristics? Features 1: bright glass luster.
When you listen to the sound to distinguish jadeite, you can tap its surface first and listen to the sound made by jadeite. If it is natural jade, we usually hear a crisp sound when knocking at the door, because the internal structure of natural jade is dense and there are no bubbles.
The identification methods of jadeite include luster, hardness, color, texture, interior and infrared identification. Gloss: The luster of jadeite is incomparable to any other stone, and its luster is crystal clear. Hardness: The hardness of jadeite is relatively high, so when drawing glass, you can draw glass, not jadeite.
The methods to identify jadeite include net weight, color root, sound, luster, section under high magnification magnifying glass, inspection certificate, etc. Look at the net weight and weigh the net weight of jade. Many fake jadeites are made of laminated glass, natural marble and its plastics.
What kinds of instruments are commonly used for gem identification?
Tweezers and flashlight tweezers are best made of stainless steel, and there should be teeth in the clip to prevent the gem from slipping. Gem flashlight is a convenient and practical lighting tool for gem identification.
The machine for identifying jade is generally like this: the polarizer is used to see light. It is very important for Libra to measure density, and the measured density can be compared with the density table. Ultraviolet fluorescent lamp injected with glue jade can be seen at a glance with this. The injected glue will fluoresce.
The commonly used tools for jadeite identification mainly include: 1. Magnifier, which can be used to see the fine features of jadeite, such as acid corrosion and growth lines. Second, look at the internal structure, cracks and other defects of jade with a strong flashlight. Third, test the hardness of jade with a small steel knife.
Used for amplification: microscope, magnifying glass (most commonly used 10 times, magnifying glass with ultraviolet lamp) to detect gemstones: refractometer, spectroscope, polarizer (often used to identify crystals), Charles filter, dichroism (to identify polychromatic gemstones), and the large-scale ones mentioned upstairs. Just look at my website.
This depends on whether you are a professional or an amateur. Professional words, such as quality supervision stations and jewelry colleges, use more instruments, and large jewelry appraisal instruments are also necessary.
Jewelry appraisal instruments can test these properties. At present, the commonly used and easy-to-master gem identification instruments are: pen spotlight flashlight: used to observe the transparency of thick-colored gems. Beads of spotlight flashlight should be concave in the writing surface, not protruding from the writing surface, otherwise it is not easy to observe.
Who can tell me what to use for the jade authenticity tester?
How about the quality? What is the value? There are many ways for scientific and technological workers to identify jadeite. Generally speaking, these identification methods can be summarized into three categories: sensory identification, instrument detection and liquid identification. Sensory recognition must point out that sensory recognition must be based on professional knowledge and practical experience, both of which are indispensable.
Waxing is to coat a layer of colored or colorless wax on the real jade ornaments, which is also an act of shoddy, which can change the moisture and color of jade and sell it at a high price. At this time, you need to pay attention, because it is likely to issue a real jade certificate, but you don't have to worry about showing your true colors under the purple light.
The flashlight used to identify jadeite needs to be small in size. If it is too big, it is quite inconvenient to identify jadeite, and the small flashlight is very easy to use. At the same time, it is best to choose a flat flashlight instead of a pointed one, otherwise it is easy to scratch jade during identification.
Identification method of jadeite jade
1, identify jade We can listen to the sound of jade, such as jade bracelets. First, tie the jade bracelets with thin threads, hang them in the air, and then tap them with something like a glass rod. The sound of natural jadeite is crisp; The sound made by fake jadeite is dull and not crisp enough.
2. The simplest identification method of jadeite is: luster: after being soaked in strong acid and alkali, jadeite has loose structure, and before being filled, there are pits on the surface, which makes it spread and its luster weaken.
3. Jade appraisal has a coup. It is enough to master these jadeite identification methods: violet light irradiation is to use a violet flashlight to see if jadeite has a fluorescent reaction.
4. Look at emeralds, which is a unique feature of natural jade. Fakes made of imitation glass and ceramics have no emerald characteristics. Listening to the sound, tapping natural jadeite will make a loud and crisp sound, while counterfeiting will make a dull sound, but not all jadeite ornaments are suitable, and bracelets are more suitable.
What are the identification methods of jadeite?
Identify by burning. There is also a way to identify real jade, that is, put jade on a lighted candle and burn it with flame, which is roughly the same as soaking it in hot water. The color of real jadeite will not fade after firing. After the fake jadeite is fired, the color on it will obviously fade.
The identification method of jadeite is through observation. The color of jadeite should be natural, full and even, and it should not be excessively bleeding or artificially dyed. There are many colors of jadeite, such as green, cyan, white and yellow, but the color of jadeite should be natural, not artificial.
Look at emeralds, which are unique features of natural jade. Fakes made of imitation glass and ceramics have no emerald characteristics. Listening to the sound, tapping natural jadeite will make a loud and crisp sound, while counterfeiting will make a dull sound, but not all jadeite ornaments are suitable, and bracelets are more suitable.
The simplest way to identify jadeite is: luster: after being soaked in strong acid and alkali, jadeite has loose structure, and there are pits on the surface before it is full, which makes it spread and its luster weaken. After adding organic fillers such as resin or plastic, jadeite often appears resin luster or wax luster, or glass luster mixed with resin luster and wax luster.