As one of the seven treasures of Buddhism, the lapis lazuli has always been loved and sought after by ancient emperors. But in the modern literary and play market, lapis lazuli has not received enough attention. Until 2013, under the unremitting promotion of major media, the market of lapis lazuli began to heat up.
However, with the increase of demand, the optimized processing of lapis lazuli has repeatedly appeared in the market, and since the lapis lazuli has not been valued before, most players can not understand the identification method of lapis lazuli in detail today. Xiaobian will introduce to you, several identification methods of lapis lazuli.
First, look at the color
The identification of lapis lazuli first looks good in color blue and does not look good. If the color is too light, the calcite content is high and the hardness of the stone itself will be low. If the color is too deep, it means that the pyrite content of Venus on the stone is too high, which leads to the faint color of lapis lazuli. Therefore, the blue is rich, pure, uniform, shiny, and the value of lapis lazuli without or with the micro-belt is high.
Second, look at the structure
There are many ways to fake lapis lazuli. The lower level is pretending to be marble, and the higher point is to use the sodalite and blue smectites that resemble lapis lazuli. Sodalite and lapis lazuli are similar in mineral structure and color. The difference is that the sodalite does not contain pyrite, the density is relatively low, and the coarse particle structure can be seen with the naked eye. If illuminated with a UV lamp, sodalite will emit orange-red fluorescence, while lapis lazuli will produce white fluorescence. The blue sapphire color is also blue, but under ultraviolet light, the blue smectite also emits orange-red fluorescence.
Third, alcohol identification
The most commonly used and effective method of identification is to contact lapis lazuli with alcohol or acid, and the dyed lapis lazuli will quickly fade when exposed to acid or alcohol. High concentrations of medical alcohol are recommended here. Specific method: Take a proper amount of alcohol with a cotton swab, and repeatedly wipe the surface of the lapis lazuli for about half a minute. If the blue color on the cotton swab is dyed lapis lazuli, the colorless is natural lapis lazuli.
Nowadays, the method of imitation of lapis lazuli is endless. Now there are many patterns of lapis lazuli imitation, and the most inferior lapis lazuli dyeing and filling, which increases the brightness and color, can also improve the integrity of lapis lazuli. "In the past, the lapis lazuli dyeing and filling test can be distinguished by decolorizing agent. Now the unscrupulous merchants will dye the lapis lazuli, so that the lapis lazuli can not be removed." The dyed lapis lazuli can be seen as "white spot" identification. The lapis lazuli, which usually uses a coloring agent, is brightly colored, and it is still possible to see that the blue color of the staining agent is present in the white spot, which gives an uncomfortable feeling. The natural lapis lazuli blue and white are distinct. If you see a layer of indigo on the white part, you should pay attention to it. It may be fake.
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