2 Methods to use: USING REFLECTED LIGHT - this method can be used for jewelry with a of transparency. TRANSMITTED LIGHT - this method can be used for jewelry with a low degree of transparency. Authenticity: the authenticity of your gemstones. Discover the science behind gemstone authentication and protect your investments. Gemological spectroscopes play a crucial role in gemstone analysis, providing gemologists with valuable information for gemstone identification, evaluation, and research. The actual product may have slight color difference or difference, which will not affect the use Colour:Black Material:aluminum Package Contents: 1 x Gemological Spectrometer 1 x Case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. It enables gemologists to obtain detailed information from gemstone samples, aiding in their evaluation and classification. Spectrometer is a instrument used in gemology for analyzing the optical properties of gemstones. It utilizes a raster-type scanning method to systematically examine the of a gemstone and collect data. Raster type Gemological Spectrometer is a instrument used in gemology for analyzing the optical properties of gemstones. It utilizes a raster-type scanning method to systematically examine the of a gemstone and collect data. HOW TO USE: When using a spectroscope to identify jewelry, keep your eyes close to the eyepiece. The effect can be visualized using a strong gas torch.