5 thoughts on “tazza jewelry wholesale How to distinguish between gems”
Eugene
bulk wholesale jewelry making supplies The title of the original poster is a bit big! True and false sapphires are first similar to sapphire; secondly there are synthetic sapphires; third, there are optimization to deal with sapphire. Three types of simple identification methods are as follows: . The identification of sapphire and similar gemstones: 1, similar gems: blue cone mineral, green stone, blue spinel stone, and tanzan stone. 2, sapphire physical properties: color (blue-blue purple); multi-color (obvious); refractive index (1.762-1.770 [ 0.009, -0.005]), the double refractive index value is 0.008-0.010; (3.95-4.10); at the same time, it is glass luster and low -colored. 3, the difference between the blue cone mine: the double refractive index of the blue cone ore is very large, which can reach 0.047. And sapphire manifested as fluorescent inertia. 4. The difference from 石: The green stone has a strong multi -color (blue, purple and light yellow) that can be observed with the naked eye. The density of the green stone is significantly lower than that of sapphire, and the green stone is suspended in the heavy liquid of 2.65, and the sapphire sinks. 5. The difference between blue spinels: Blue spinel is a homogeneous gemstone, and only a refractive index value can be measured (1.718). 6. The difference between Tanzanite: Tanzanite has obvious poly color. You can see that the colors of the three directions are blue, purple -red and green and yellow. Compared with sapphire, it has a lower density (3.10-3.45) and has a relatively low refractive index of 1.691-1.700. . Synthetic sapphire identification: 1, flame melting method of synthetic sapphire and natural sapphire and natural sapphire: (1) growth pattern The growth line of some synthetic sapphire is more obvious, but the growth line of its yellow varieties is very found. In addition, due to the continuous development of synthetic technology, the diameter of the synthetic sapphire pear crystal has become large, and the curvature of its growth lines is relatively small. Come big difficulty. (2) Bubble: The bubble bun body in the sapphire synthetic sapphire is similar to the bubbles in the synthetic ruby. Sometimes, blue substances are gathered around the bubbles. (3) Luminousness: Natural sapphire usually manifested in inertia (occasionally fluorescent reactions) in ultraviolet light, and the luminousness of the flame melting method is more active, and different colors of samples have different fluorescent characteristics. Colorless synthetic samples can have light blue fluorescence under short waves of ultraviolet light. Green synthetic samples can have orange fluorescence under long -wave ultraviolet lights. Blue synthetic samples can have light blue -white or light green fluorescence under short -wave ultraviolet light. (4) Absorption spectrum: blue, green, and yellow varieties in natural sapphires can be displayed all or partially in the visible optical spectrum of varieties. These absorption lines or absorption cables are weak and blurred. Some synthesis of color -changing sapphire has a clear and narrow V absorption line at 474nm. 2, the melting agent method synthesis of sapphire and natural sapphire: (1) fluorescence: pink, yellow -green, brown green and other fluorescence under ultraviolet lights, and fluorescence Strong, and natural sapphires are mostly fluorescent inertia. (2) A absorption spectrum: Compared with natural sapphire, the feldling synthesis Sagogay may miss 460nm and 470nm absorption line. . Optimize the identification of sapphire: 1, the identification of thermal treatment sapphire and natural sapphire: (1) Color: The sapphire after the heat treatment may have uneven colors, such as a plaid -shaped -shaped -shaped -shaped -shaped shape Color blocks and uneven diffusion dizziness; after the heat treatment of Shandong sapphire, the original blue ribbon can be transformed into a colorless and transparent strap; the tan color band can be transformed into a blue color strap, which originally did not display the sample heat treatment of the ribbon. After that, a yellow strap can be displayed. (2) Solid -state bag: The low -melting point bag in the sapphire is heat -treated, and part of the melting of the original columnar crystal will become smooth under the high temperature action of the high temperature for a long time. Sometimes a white silk spots can be seen on the surface of the sapphire on high temperature, which is the product of the high temperature damage of gold red stone. (3) fluid bag: After the natural sapphire is treated by heat, the native fluid bodies inside will cause bloating under high temperature, and the fluid is immersed in the cracks of new bloating. (4) Surface characteristics: Due to high temperature dissolving effects, local sapphires will occur on the surface of natural sapphires, so there are some uneven mochi pit. In order to eliminate these anecd pit samples, the second polishing effect cannot ensure the integrity of the face and corners in the first polishing, and often makes the original straight face arrears of double waist and multi -faced waist bonds. (5) Absorbing spectra and fluorescent features: The hot -treated sapphire is observed under the tabletop in a desktop. The lack of 450nm absorption bands, some hot -treated sapphire shows weak pale green or light blue fluorescent fluorescence under short waves of ultraviolet light. 2, dyeing treatment: During the enlarged examination, you can find the phenomenon of dyes of dyeing sapphire in the crack; dye sapphire may have special fluorescence caused by dyes; the absorption peak of dyes in the infrared spectrum. 3, soaked color oil: amplifying inspection, you can find that the cracks after the oil charging have colorful interference colors. When some oils are volatilized The marks of oil. With hot needle tests, oil droplets may be precipitated. 4, surface diffusion treatment: (1) Titanium diffusion treatment sapphire: color: I -type diffusion treatment sapphire is gray blue, blue surface often has a kind of water, gray, and gray. The fog -shaped appearance, while the II diffusion treatment is clear blue, blue -purple, which looks like natural high -quality sapphire. Puctulating inspection: Place the sample above the glass plate with a translucent white plastic film, and use the transmitted light clearing from the lower part. During the observation, the color is concentrated around the waist of the sample, and the type I diffusion processing sapphire shows the obvious "black circle" and "spider web" pattern. In addition, the overall color of the sample is uneven, and the color depth of different aspects is different. The above phenomenon of II diffusion treatment of sapphire is not obvious. The open cracks and performance of the sample may have color enrichment at the pit. Fluorer: Some surface diffusion treatments can have white -like blue or green fluorescence in short -wave ultraviolet light, and some samples can have blue, green and even orange fluorescence under long waves of ultraviolet light. (2) Cobalt "diffuses" to deal with sapphire: color: processing sapphire is bright cobalt blue. Many spots with slightly lighter colors can be seen on the surface of the gemstone, and the edges will appear lighter. The refractive index: exceeding the measurement range of the refractor. Observation of the spaging mirror: It can be seen that the obvious three absorption bands, that is, the cobalt absorption spectrum. (3) New types of proliferation processing sapphire: Large-scale instrument detection: determine the content in the sample, the concentration of natural sapphire surface is 1.5-5 pppma, and the depth of the sapphire surface of the sapphire treated by 铍 is the depth of the surface of the sapphire surface. 10-35ppma. Mascular: Observe the sapphire of proliferation in the proliferation of the proliferation in the two iodine methane impretions. The diffusion color can be reached from any depth inside the gemstone layer, and sometimes even penetrates the whole gemstone, which mainly depends on the processing time The length. The identification method of sapphire, if it has not been engaged in the jewelry industry for many years, or through systematic jewelry professional knowledge training, it is generally difficult to find it with the naked eye. If this is this phenomenon, it is recommended to take the baby directly to the local authoritative quality inspection department for testing!
us wholesalers of cadmium lead and nickle free jewelry The gems include diamonds, night pearls, cat eye stones, emeralds, rubies, sapphires, etc., expensive, artificial gemstones, although they are exquisitely made, but fake gemstones and the like. Under normal circumstances, fake gems can be divided into four categories, namely plastic, glass imitation; the second is to combine imitation products similar to gems; 3 fake diamonds and chemical compounds (such as tritenuxide (such as tritenuxide); fourth, add transparent pigments Minerals, pretending to be gemstone. There are some knowledge here.
The appearance: The real gem is clear and natural lines, with clouds and crystal characteristics; false gems have no natural lines, cloudless, and crystalline characteristics.
, heat: After the calories are slowly real gemstone, heat, there is a cool touch test feeling; after the fake gemstones are heat dissipation and heat, contact the heat.
three, observe with a magnifying glass: there are obvious signs such as a bending surface and internal rotation, round or oval bubbles, fracture casting, etc. Phenomenon.
Four, hardness: 10 degrees, ruby, sapphire is the hardness of diamonds with 9 degrees, and the gemstone hardness is low. If you do not affect the beauty of the website, take a look at the diamond lottery of the stone. If you can leave the real diamonds of the scratches; you can also see the yellow jade gemstone reference (hardness 8), and if you leave the real gemstone.
five colors: red, blue, green, orange, purple, yellow and other colors. For example, ruby, with the best pigeon blood red, natural gemstones look at the magnifying glass, and also have debris and cracks; and artificial gemstones are particularly pure, no impurities, bubbles, traces of "do".
6, multi -colored: how to color the color of the gemstone. If you overlook the sapphire blue, the blue -green side view of the sun; the false gem does not have such a function.
Seven, fire roasting: The real gem will not be baked; under the condition of roasting pseudo -gemstone, when the temperature rises to 90 degrees Celsius, it will be broken. This may be because fakes are false.
china acrylic jewelry display stand wholesale Pay content for time limit to check for freenAnswer 1. Feeling the hand -felt gem distinguishing the authentic tips can be distinguished by feeling the feel of true and false. The real gemstone has good heat transfer and thermal conductivity. The feeling of holding in the hand is cold, but this kind of cold The feeling will disappear soon, and the fake gemstone feels gentle. 2. In addition, the gemstone can also be identified by the weight of the gemstone. The real gem structure is dense and the proportion is large. It has a certain amount of weight on the hand. 3. Test hardness gemstones can also be identified by testing hardness. The real gem texture is generally hard, and the surface cannot be traces on the surface with a knife. The hardness of the fake gemstones is generally small, and traces can be used with a knife.
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kabbalah jewelry wholesale 1. Pen -style conservation flashlight: It is used to observe the transparency of thick color gems. The electric beads of the concentration should be reached on the pen, and the pen should not be protruded, otherwise it is not convenient to observe. 2. Magic Mirror: It is one of the instruments of gem amplification observation. The most commonly used is a 10 -fold mirror, and there are several types of 20 or 30 times. A magnifying glass is a key tool and necessary thing for gem experts, which is easy to carry. It can be used to identify the variety and authenticity of gems. 3. Both color mirror: Some gems are multicolored, and the best instrument with the best color of gemstones is a dilateral mirror. Both -color mirror is a reasonable structure, cheap, small and simple optical instrument. The bin -color mirror uses a suitable transparent colorless square lipstick (ice continents) diamond surface. Due to the high double refractive index of ice continents, the instrument can separate the two plane polarized light through the gemstone. The requirements must be a single crystal gemstone with transparent colors to detect multi -color, and jade cannot detect multi -color. Both -color mirrors are mainly used to distinguish Ruby and red spinels, red purple tooth black; distinguish between blue spinels and small blue tourmalines; differentiated sapphires and blue artificial synthetic spinels. The gemstone must be continuously rotated when the gemstone is detected by a dilateral mirror, until the two largest colors of the two different differences appear on the window. For the determination of the three colors of the gem, it is necessary to carefully detect it. Observe from three different directions, the three colors appear to be three -color. Attention during testing: Eyes, binary mirrors and gem samples should not exceed 2-5 mm. 4. Folding meter: The discount rate is an important optical constant of transparent gemstones, and it is the main basis for identifying gem varieties. There are two main methods for measuring the discount rate: one is the direct measurement method, which is measured by a folding meter; the other is the relative measurement method, and the liquid is immersed. The folder is made based on the principle of full reflection of light. The commonly used folding instrument is only suitable for gems with a discount rate of 1.36-1.81. The calculation method of the discount rate (n) of the treasure jade is the ratio of the proportion of transmission (V1) in the air (V1) in the air (V1) to the propagation speed (V2) in the gemstone to a constant, that is, n = v1 /v2 . The average body gemstone, the light spreads in it, the transmission speed is unchanged, and the discount rate is equal, which is called a single discount rate. The non -average gemstone, there are two readings in the folder, the difference between the maximum and minimum discount rate value is called a dual discount rate. The folding instrument is one of the most commonly used instruments used by gemologists. Its size is small and easy to use. He can not only test the discount rate of face -to -face gemstones, but also use a point test method to measure the discount rate of curved gems. Extension information: This Guide: 1. First of all, it is necessary to objectively prevent buying fakes although the gem is small, but the value is quite high. An inconspicuous gemstone can sometimes be comparable to the price of a color TV, a car, and even a Boeing machine. If you buy a fake, it has a huge loss. To prevent buying fake goods, in addition to subjectively mastering a certain theoretical knowledge and accumulating rich practical experience, it is best to go to a regular specialized jewelry store to buy. It, in order to increase corporate reputation and safeguard the interests of consumers, some domestic jewelry manufacturers and stores take the initiative to take measures to consult the majority of consumers. For example, some jewelry shops hire jewelry experts to answer various questions for consumers and identify jewelry for free on the spot. Many domestic villages, including small and medium villages, have such service measures. 2, carrying basic tools to identify gems , even if you buy jewelry in a state -owned store, you cannot take it lightly. In order to improve the accuracy of the identification, you must carry the most basic tools, such as magnifying glass and concentrated flashlight. Carrying these tools has no difficulty for consumers. In the magnifying glass to observe the bright level and degree of damage of the appearance of the gemstone, so as to determine the advantages and disadvantages of gems, and identify the variety of gems. To identify the magnifying glass for gemstones, it is better to use a 10 -fold one to prepare another 20 times. Use a concentrated flashlight to observe the transparency of the gemstone. Reference materials Source: Sogou Encyclopedia-Gem
bulk wholesale jewelry making supplies The title of the original poster is a bit big! True and false sapphires are first similar to sapphire; secondly there are synthetic sapphires; third, there are optimization to deal with sapphire. Three types of simple identification methods are as follows:
. The identification of sapphire and similar gemstones:
1, similar gems: blue cone mineral, green stone, blue spinel stone, and tanzan stone.
2, sapphire physical properties: color (blue-blue purple); multi-color (obvious); refractive index (1.762-1.770 [ 0.009, -0.005]), the double refractive index value is 0.008-0.010; (3.95-4.10); at the same time, it is glass luster and low -colored.
3, the difference between the blue cone mine: the double refractive index of the blue cone ore is very large, which can reach 0.047. And sapphire manifested as fluorescent inertia.
4. The difference from 石: The green stone has a strong multi -color (blue, purple and light yellow) that can be observed with the naked eye. The density of the green stone is significantly lower than that of sapphire, and the green stone is suspended in the heavy liquid of 2.65, and the sapphire sinks.
5. The difference between blue spinels: Blue spinel is a homogeneous gemstone, and only a refractive index value can be measured (1.718).
6. The difference between Tanzanite: Tanzanite has obvious poly color. You can see that the colors of the three directions are blue, purple -red and green and yellow. Compared with sapphire, it has a lower density (3.10-3.45) and has a relatively low refractive index of 1.691-1.700.
. Synthetic sapphire identification:
1, flame melting method of synthetic sapphire and natural sapphire and natural sapphire:
(1) growth pattern The growth line of some synthetic sapphire is more obvious, but the growth line of its yellow varieties is very found. In addition, due to the continuous development of synthetic technology, the diameter of the synthetic sapphire pear crystal has become large, and the curvature of its growth lines is relatively small. Come big difficulty.
(2) Bubble: The bubble bun body in the sapphire synthetic sapphire is similar to the bubbles in the synthetic ruby. Sometimes, blue substances are gathered around the bubbles.
(3) Luminousness: Natural sapphire usually manifested in inertia (occasionally fluorescent reactions) in ultraviolet light, and the luminousness of the flame melting method is more active, and different colors of samples have different fluorescent characteristics. Colorless synthetic samples can have light blue fluorescence under short waves of ultraviolet light. Green synthetic samples can have orange fluorescence under long -wave ultraviolet lights. Blue synthetic samples can have light blue -white or light green fluorescence under short -wave ultraviolet light.
(4) Absorption spectrum: blue, green, and yellow varieties in natural sapphires can be displayed all or partially in the visible optical spectrum of varieties. These absorption lines or absorption cables are weak and blurred. Some synthesis of color -changing sapphire has a clear and narrow V absorption line at 474nm.
2, the melting agent method synthesis of sapphire and natural sapphire:
(1) fluorescence: pink, yellow -green, brown green and other fluorescence under ultraviolet lights, and fluorescence Strong, and natural sapphires are mostly fluorescent inertia.
(2) A absorption spectrum: Compared with natural sapphire, the feldling synthesis Sagogay may miss 460nm and 470nm absorption line.
. Optimize the identification of sapphire:
1, the identification of thermal treatment sapphire and natural sapphire:
(1) Color: The sapphire after the heat treatment may have uneven colors, such as a plaid -shaped -shaped -shaped -shaped -shaped shape Color blocks and uneven diffusion dizziness; after the heat treatment of Shandong sapphire, the original blue ribbon can be transformed into a colorless and transparent strap; the tan color band can be transformed into a blue color strap, which originally did not display the sample heat treatment of the ribbon. After that, a yellow strap can be displayed.
(2) Solid -state bag: The low -melting point bag in the sapphire is heat -treated, and part of the melting of the original columnar crystal will become smooth under the high temperature action of the high temperature for a long time. Sometimes a white silk spots can be seen on the surface of the sapphire on high temperature, which is the product of the high temperature damage of gold red stone.
(3) fluid bag: After the natural sapphire is treated by heat, the native fluid bodies inside will cause bloating under high temperature, and the fluid is immersed in the cracks of new bloating.
(4) Surface characteristics: Due to high temperature dissolving effects, local sapphires will occur on the surface of natural sapphires, so there are some uneven mochi pit. In order to eliminate these anecd pit samples, the second polishing effect cannot ensure the integrity of the face and corners in the first polishing, and often makes the original straight face arrears of double waist and multi -faced waist bonds.
(5) Absorbing spectra and fluorescent features: The hot -treated sapphire is observed under the tabletop in a desktop. The lack of 450nm absorption bands, some hot -treated sapphire shows weak pale green or light blue fluorescent fluorescence under short waves of ultraviolet light.
2, dyeing treatment:
During the enlarged examination, you can find the phenomenon of dyes of dyeing sapphire in the crack; dye sapphire may have special fluorescence caused by dyes; the absorption peak of dyes in the infrared spectrum.
3, soaked color oil:
amplifying inspection, you can find that the cracks after the oil charging have colorful interference colors. When some oils are volatilized The marks of oil. With hot needle tests, oil droplets may be precipitated.
4, surface diffusion treatment:
(1) Titanium diffusion treatment sapphire:
color: I -type diffusion treatment sapphire is gray blue, blue surface often has a kind of water, gray, and gray. The fog -shaped appearance, while the II diffusion treatment is clear blue, blue -purple, which looks like natural high -quality sapphire.
Puctulating inspection: Place the sample above the glass plate with a translucent white plastic film, and use the transmitted light clearing from the lower part. During the observation, the color is concentrated around the waist of the sample, and the type I diffusion processing sapphire shows the obvious "black circle" and "spider web" pattern. In addition, the overall color of the sample is uneven, and the color depth of different aspects is different. The above phenomenon of II diffusion treatment of sapphire is not obvious. The open cracks and performance of the sample may have color enrichment at the pit.
Fluorer: Some surface diffusion treatments can have white -like blue or green fluorescence in short -wave ultraviolet light, and some samples can have blue, green and even orange fluorescence under long waves of ultraviolet light.
(2) Cobalt "diffuses" to deal with sapphire:
color: processing sapphire is bright cobalt blue. Many spots with slightly lighter colors can be seen on the surface of the gemstone, and the edges will appear lighter.
The refractive index: exceeding the measurement range of the refractor.
Observation of the spaging mirror: It can be seen that the obvious three absorption bands, that is, the cobalt absorption spectrum.
(3) New types of proliferation processing sapphire:
Large-scale instrument detection: determine the content in the sample, the concentration of natural sapphire surface is 1.5-5 pppma, and the depth of the sapphire surface of the sapphire treated by 铍 is the depth of the surface of the sapphire surface. 10-35ppma.
Mascular: Observe the sapphire of proliferation in the proliferation of the proliferation in the two iodine methane impretions. The diffusion color can be reached from any depth inside the gemstone layer, and sometimes even penetrates the whole gemstone, which mainly depends on the processing time The length.
The identification method of sapphire, if it has not been engaged in the jewelry industry for many years, or through systematic jewelry professional knowledge training, it is generally difficult to find it with the naked eye. If this is this phenomenon, it is recommended to take the baby directly to the local authoritative quality inspection department for testing!
us wholesalers of cadmium lead and nickle free jewelry The gems include diamonds, night pearls, cat eye stones, emeralds, rubies, sapphires, etc., expensive, artificial gemstones, although they are exquisitely made, but fake gemstones and the like. Under normal circumstances, fake gems can be divided into four categories, namely plastic, glass imitation; the second is to combine imitation products similar to gems; 3 fake diamonds and chemical compounds (such as tritenuxide (such as tritenuxide); fourth, add transparent pigments Minerals, pretending to be gemstone. There are some knowledge here.
The appearance: The real gem is clear and natural lines, with clouds and crystal characteristics; false gems have no natural lines, cloudless, and crystalline characteristics.
, heat: After the calories are slowly real gemstone, heat, there is a cool touch test feeling; after the fake gemstones are heat dissipation and heat, contact the heat.
three, observe with a magnifying glass: there are obvious signs such as a bending surface and internal rotation, round or oval bubbles, fracture casting, etc. Phenomenon.
Four, hardness: 10 degrees, ruby, sapphire is the hardness of diamonds with 9 degrees, and the gemstone hardness is low. If you do not affect the beauty of the website, take a look at the diamond lottery of the stone. If you can leave the real diamonds of the scratches; you can also see the yellow jade gemstone reference (hardness 8), and if you leave the real gemstone.
five colors: red, blue, green, orange, purple, yellow and other colors. For example, ruby, with the best pigeon blood red, natural gemstones look at the magnifying glass, and also have debris and cracks; and artificial gemstones are particularly pure, no impurities, bubbles, traces of "do".
6, multi -colored: how to color the color of the gemstone. If you overlook the sapphire blue, the blue -green side view of the sun; the false gem does not have such a function.
Seven, fire roasting: The real gem will not be baked; under the condition of roasting pseudo -gemstone, when the temperature rises to 90 degrees Celsius, it will be broken. This may be because fakes are false.
china acrylic jewelry display stand wholesale Pay content for time limit to check for freenAnswer 1. Feeling the hand -felt gem distinguishing the authentic tips can be distinguished by feeling the feel of true and false. The real gemstone has good heat transfer and thermal conductivity. The feeling of holding in the hand is cold, but this kind of cold The feeling will disappear soon, and the fake gemstone feels gentle. 2. In addition, the gemstone can also be identified by the weight of the gemstone. The real gem structure is dense and the proportion is large. It has a certain amount of weight on the hand. 3. Test hardness gemstones can also be identified by testing hardness. The real gem texture is generally hard, and the surface cannot be traces on the surface with a knife. The hardness of the fake gemstones is generally small, and traces can be used with a knife.
buy name brand jewelry wholesale 00:00 / 00: 5370% shortcut keys to describe space: Play / pause ESC: Exit full screen ↑: increase volume 10% ↓: decreases by 10% →: Single fast forward 5 seconds studio Here you can drag no longer appear in the player settings to reopen the small window shortcut key description
kabbalah jewelry wholesale 1. Pen -style conservation flashlight: It is used to observe the transparency of thick color gems. The electric beads of the concentration should be reached on the pen, and the pen should not be protruded, otherwise it is not convenient to observe.
2. Magic Mirror: It is one of the instruments of gem amplification observation. The most commonly used is a 10 -fold mirror, and there are several types of 20 or 30 times. A magnifying glass is a key tool and necessary thing for gem experts, which is easy to carry. It can be used to identify the variety and authenticity of gems.
3. Both color mirror: Some gems are multicolored, and the best instrument with the best color of gemstones is a dilateral mirror. Both -color mirror is a reasonable structure, cheap, small and simple optical instrument. The bin -color mirror uses a suitable transparent colorless square lipstick (ice continents) diamond surface. Due to the high double refractive index of ice continents, the instrument can separate the two plane polarized light through the gemstone.
The requirements must be a single crystal gemstone with transparent colors to detect multi -color, and jade cannot detect multi -color. Both -color mirrors are mainly used to distinguish Ruby and red spinels, red purple tooth black; distinguish between blue spinels and small blue tourmalines; differentiated sapphires and blue artificial synthetic spinels.
The gemstone must be continuously rotated when the gemstone is detected by a dilateral mirror, until the two largest colors of the two different differences appear on the window. For the determination of the three colors of the gem, it is necessary to carefully detect it. Observe from three different directions, the three colors appear to be three -color. Attention during testing: Eyes, binary mirrors and gem samples should not exceed 2-5 mm.
4. Folding meter: The discount rate is an important optical constant of transparent gemstones, and it is the main basis for identifying gem varieties. There are two main methods for measuring the discount rate: one is the direct measurement method, which is measured by a folding meter; the other is the relative measurement method, and the liquid is immersed. The folder is made based on the principle of full reflection of light.
The commonly used folding instrument is only suitable for gems with a discount rate of 1.36-1.81. The calculation method of the discount rate (n) of the treasure jade is the ratio of the proportion of transmission (V1) in the air (V1) in the air (V1) to the propagation speed (V2) in the gemstone to a constant, that is, n = v1
/v2
. The average body gemstone, the light spreads in it, the transmission speed is unchanged, and the discount rate is equal, which is called a single discount rate.
The non -average gemstone, there are two readings in the folder, the difference between the maximum and minimum discount rate value is called a dual discount rate. The folding instrument is one of the most commonly used instruments used by gemologists. Its size is small and easy to use. He can not only test the discount rate of face -to -face gemstones, but also use a point test method to measure the discount rate of curved gems.
Extension information:
This Guide:
1. First of all, it is necessary to objectively prevent buying fakes
although the gem is small, but the value is quite high. An inconspicuous gemstone can sometimes be comparable to the price of a color TV, a car, and even a Boeing machine. If you buy a fake, it has a huge loss. To prevent buying fake goods, in addition to subjectively mastering a certain theoretical knowledge and accumulating rich practical experience, it is best to go to a regular specialized jewelry store to buy.
It, in order to increase corporate reputation and safeguard the interests of consumers, some domestic jewelry manufacturers and stores take the initiative to take measures to consult the majority of consumers. For example, some jewelry shops hire jewelry experts to answer various questions for consumers and identify jewelry for free on the spot. Many domestic villages, including small and medium villages, have such service measures.
2, carrying basic tools to identify gems
, even if you buy jewelry in a state -owned store, you cannot take it lightly. In order to improve the accuracy of the identification, you must carry the most basic tools, such as magnifying glass and concentrated flashlight. Carrying these tools has no difficulty for consumers.
In the magnifying glass to observe the bright level and degree of damage of the appearance of the gemstone, so as to determine the advantages and disadvantages of gems, and identify the variety of gems. To identify the magnifying glass for gemstones, it is better to use a 10 -fold one to prepare another 20 times. Use a concentrated flashlight to observe the transparency of the gemstone.
Reference materials Source: Sogou Encyclopedia-Gem