Teach you how to identify genuine and fake diamonds

Diamonds are expensive and rare, making use of some unscrupulous traders to profit fake, there is no quick and accurate method to all kinds of fake diamonds and diamond to distinguish it? Is there, and more than one.
These distinctions in the way described, we will substitute the nature of the diamond and the inclusion of a table to see where they differ between:
In the table, the diamond may substitute (and bogus goods) divided into three categories: the first includes cubic zirconia, GGG and so the four, and their optical properties, ie refractive index and dispersion are similar with the diamonds, and are homogeneous body without birefringence, therefore, to figure out the gem and diamond finished appearance is very similar, in order to distinguish, only according to hardness, specific gravity and thermal conductivity; the second category include zircon, synthetic rutile of four, the appearance of their finished products Diamond also similar (but not as good as the first category), but because of very high birefringence, can be seen in the finished product on the obvious double shadow, and the diamond easily distinguished. Of course, their hardness, specific gravity and lead hotline, and diamonds are also very different; third category includes colorless sapphire, crystal and other five, which is characterized by low refractive index, not appearance similar to diamonds. Therefore, conditions can be measured with Refractometer their refractive index. When the measured refractive index figures, immediately know that it was not substitutes for diamonds. Of course, their hardness and thermal conductivity, but also very different with the diamond.
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Overall, diamonds and all of its substitutes (or pretending to goods), with the largest difference between two points, one hardness, the second is thermal conductivity. So, can produce two different instruments, used to rapidly and accurately distinguish diamond and all the alternative products or counterfeit goods.
Diamond Tester
Thermal conductivity refers to the heat conductivity of material, where the thermal conductivity of the material strength, can rapidly transmit heat, such as the familiar gold scrap copper and aluminum. When people hand touch of copper, aluminum, because their hands will spread the heat quickly, so are the metal is "cold." Another example is the timber, its thermal conductivity is very weak, so staff feel that he does is warm.
Strength of thermal conductivity can be expressed in figures, the greater the number the stronger the thermal conductivity, for example, the relative thermal conductivity of copper is 0.927, aluminum 0.485. As can be seen from the table of thermal conductivity of diamonds is very strong, even more than copper and aluminum, and the relative thermal conductivity as high as 1.6-4.8. The diamonds are substitutes then, thermal conductivity is much weaker than diamond. Can be seen from the table, most of the substitutes are lower than the thermal conductivity of 0.01, that is 100 times more than the end of diamonds, like glass, its thermal conductivity of the worst race 1000 times lower than the diamond. Although the thermal conductivity of sapphire higher than diamonds have 10 times or even several times lower.

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Thus, if created a device that can quickly measure the thermal conductivity of gems that distinguish real diamonds and fake diamonds really easy for the. This equipment has been made, it's English name is called "Diamond Master", the Chinese can be translated as "diamond tester." The figure is a diamond detector photos. It's shaped like a meter, outreach a wire, cable front-end like a pen, the pen and the top is a "probe." Open the switch to turn on the power used (generally with a 9v battery), the probe contacts with the tested stones (stones prior to wipe clean, not greasy dirt), then the instrument began to turn a pointer, when the rotation angle much more than the instrument calibration zone, the measured real gem is the diamond, if the pointer deflection angle is small, reaching less than a calibration area, which measured a fake gemstones.
Simple diamond detector, only shows that the measured is the true gem diamonds or fake diamonds; construct complex diamond detector, also can estimate what is fake diamonds, for example, cubic oxide guy, or YAG, etc.. Because the different manufacturers, this instrument been improvements, such as the cancellation of the wire and the guide probe mounted Zai instruments outstanding on a short tube with different colored LEDs display test results, the green light real diamonds , red light was fake diamonds.
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Small size of the diamond detector, and a pack of cigarettes or less the same clothes can be easily placed in the.
Standard hardness
Distinguish between true and false use of diamond tester diamond, of course, very good, but the price of this equipment is more expensive, we can also use another effective method, that is testing the hardness of gemstones. We know that the diamond is the hardest substance in the world, its hardness is the hardness of 10, with a diamond can scratch any substance, any substance can be impossible to scratch diamond. According to this theory, people create a "standard hardness tester", which is a size of 65 × 55 × 23mhl the square box, open the lid, the inside set with four standard hardness of tablets, which have been precision grinding the surface smooth as a mirror. 4 standard hardness film hardness were 6,7,8,9.

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