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Which jewelry appraisal instrument is suitable for gem appraisal?

Jewelry appraisal is a professional job that requires the use of specialized instruments for accurate appraisal. There are many types of gem identification instruments. Different instruments have different functions and characteristics and are suitable for different types of gem identification. The following will introduce several common gem identification instruments and analyze their scope of application and characteristics.

1. Microscope

The microscope is one of the instruments commonly used in gem identification. It uses a magnifying lens to observe the internal structure and external characteristics of gems for identification. A microscope makes it easy to examine the cutting and polishing of a gemstone and identify imperfections, inclusions, and possible stone counterfeits. At the same time, a microscope can help appraisers observe the optical effects of gemstones, such as flash, color changes, etc. This is of great significance for identifying the authenticity and quality of gemstones.

2. Refractometer

A refractometer is another commonly used instrument in gem identification and is used to measure the refractive index of gemstones. Refractive index is a very critical parameter in gem identification, which can help appraisers determine the type of gem. Different types of gemstones have different refractive index ranges, so by measuring the refractive index of the gemstone, you can initially determine the type of gemstone. The refractometer is simple and convenient to use and is very helpful for the early identification of gemstones.

3. Polarimeter

A polarimeter is an instrument capable of measuring the optical properties of gemstones. It observes and measures the optical behavior of gemstones through the polarization phenomenon of light, such as color doubling effect, disappearance of polarization and other phenomena. It can help the appraiser determine whether the gemstone has birefringence and further identify the optical properties of the gemstone. Polarimeter has the characteristics of high precision and high resolution, which is very important for the optical identification of gemstones.

4. Spectrometer

A spectrometer is an instrument used to measure the spectrum of gemstones. The spectral characteristics of the gem are obtained by passing the gem through a spectroscope and decomposing it into different wavelengths, and then using a photomultiplier tube or photodetector to measure the light intensity of the different wavelengths. The spectral characteristics of gems are one of the most important information in gem identification, which can help appraisers determine the type, origin and whether the gem has been treated. The use of spectrometers can provide very accurate and reliable gem spectrum data, providing strong support for gem identification and certificate preparation.

jewelry magnifying glass

5. Chemical tester

A chemical tester is an instrument used to detect the mineral composition of gemstones. The composition of gemstones is one of the important bases for identifying their type and authenticity. Chemical testers can detect chemical elements or chemical components in gems through chemical reactions or elemental analysis methods to determine the composition and purity of gems. The use of chemical testers can provide intuitive and reliable gem composition data, which plays an important role in the authenticity identification and quality assessment of gems.

To sum up, different gem identification instruments have different functions and characteristics. In the actual gem identification process, the appraiser can choose the appropriate instrument to use based on the required identification information and technical requirements. The microscopes, refractometers, polarizers, spectrometers and chemical testers introduced above are commonly used instruments in gem identification and provide strong support for gem identification and certificate preparation. Their comprehensive use can improve the accuracy and reliability of gem identification and help appraisers make scientific and objective judgments and conclusions.

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