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  • 1.30-1.81 RI Range Gemstone Refractometer Detection Built-in Power Gem Tester DIY Jewelry Tools
  • 1.30-1.81 RI Range Gemstone Refractometer Detection Built-in Power Gem Tester DIY Jewelry Tools
  • 1.30-1.81 RI Range Gemstone Refractometer Detection Built-in Power Gem Tester DIY Jewelry Tools
  • 1.30-1.81 RI Range Gemstone Refractometer Detection Built-in Power Gem Tester DIY Jewelry Tools
  • 1.30-1.81 RI Range Gemstone Refractometer Detection Built-in Power Gem Tester DIY Jewelry Tools
  • 1.30-1.81 RI Range Gemstone Refractometer Detection Built-in Power Gem Tester DIY Jewelry Tools
1.30-1.81 RI Range Gemstone Refractometer Detection Built-in Power Gem Tester DIY Jewelry Tools

1.30-1.81 RI Range Gemstone Refractometer Detection Built-in Power Gem Tester DIY Jewelry Tools

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                        Refractive  Index is one of the most important optical parameters  used to identify and authenticate polished precious  and semi-precious gemstones. This Gemological refractometer  is a low cost, lightweight measuring instrument used  by jewellers and traders of gemstones   to measure polished stones over a refractive index  range of 1.30 to 1.81 RI. The instrument can also  be used to identify whether a particular stone is Isotropic  or Anistropic (uniaxial or biaxial).

                        Features: 
                        1. Can identify singly & doubly gemstones quickly  and accurately.
                        2. Uniquely  designed, low battery consumption and portable.
                        3. Approved  by strict quality and safety standards for long  and trouble-free life.
                        4. Guaranteed  high quality and accurate testing results.
                         
                        Description: 
                        Type: Gem Refractometer
                        Measuring Range: 1.30-1.81 R
                        Accuracy: ±0.002
                        Main Color: Black
                        Weight: About 330g
                        Size: 11 * 3 * 6cm
                         
                        Package Includes:
                        1 x Gem Refractometer
                        x Button Cell
                        x Oil
                        x English Manual

                        Operating Information:
                        1. Open the upper cover then wash the gem and prism with alcohol.
                        2. Lay the instrument on the worktable. Drop a little bit of special refractive oil onto the surface of prism and press it by a thin glass bar. (Be sure not too much or too little)
                        3. Make sure the ground surface of gem to be measured is close to the prism, press it again lightly, let the refractive oil be evenly distributed between the two surfaces then close the upper cover.
                        4. Press the light momentary switch, make sure that the internal light source is turned on when testing.
                        5. Move the eyepiece up and down and adjust the diopter accordingly. By this time you can see a light/dark boundary in the viewing field. The gradation (shade) on which the boundary located is called the refractive index of gem.

                         
                        Notice:
                        1. Please understand the product might have some colour difference due to different monitors and scenes.
                        2. Please allow slight deviation for the measurement data. 

                        1.30-1.81RI Rang Gemstone Refractometer Built-in Gem Tester
                        1.30-1.81RI Rang Gemstone Refractometer Built-in Gem Tester
                        1.30-1.81RI Rang Gemstone Refractometer Built-in Gem Tester

                        1.30-1.81RI Rang Gemstone Refractometer Built-in Gem Tester
                        1.30-1.81RI Rang Gemstone Refractometer Built-in Gem Tester

                        1.30-1.81RI Rang Gemstone Refractometer Built-in Gem Tester

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