YINGGEXU Mohs Hardness Pen Grade 4-10 Test Stone gem Hardness Gemstones Jade selector Detector Mohs Hardness Testing Pen Testing Machine (Color : 6pcs (Grade 4 9))

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Mohs hardness pen test method:

I. Indirect visual assessment
The hardness of the gemstone can be reflected in the smoothness of the facet after processing and the sharpness of the rib. Under the magnifying glass, you can see that the gemstone of the hardness is smooth, flat and sharp. Indirect visual inspection is a non-destructive method for approximating hardness.

Second, direct measurement method
This method is based on the mutual engraving comparison between the gem minerals to be tested and the standard hardness minerals. In 1982, the German mineralogist Moss proposed a standard mineral with the following grades: Fluorite-4, Apatite-5, Orthoclase-6, Quartz-7, Topaz-8, Corundum-9 . The difference in hardness between corundum and diamond is the largest.

Third, the use of skills and precautions
1, first indirectly visually assess the hardness of the sample;
2, find an inconspicuous place, use a hardness pen below the visual hardness of 1 to 2 to score the sample, if it does not move, it means that the hardness of the sample is higher than the hardness of the hardness pen, and then use a higher hardness pen Scribing, repeating operation, if there is only a slight trace, the hardness of the sample is equivalent to the hardness of the hardness pen, and then scribing with a higher hardness pen, repeating the operation, if leaving a trace, the hardness of the sample is lower than the The hardness of the hardness pen, at which point the hardness or range of the sample to be tested can be judged;
3, pay attention to the intensity of the sculpt should be moderate, neither too light nor too heavy
4, because the direct characterization method to determine the hardness, damage to the gemstone, generally should not be allowed to use this for the finished gem
The hardness of a gemstone is closely related to its antiwear and is an important factor in determining the value of a gemstone. There are two types of gem hardness measurement: indirect visual estimation and direct measurement.
Please contact us if you have any question. We will work with you to solve any problems. Thank you!

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