Professional 1.30-1.81 Gemstone Jewelry Refractometer Jade/Emerald Identification Device with LED Flashlight

Structure of Gemstone Refractometer:
- The gemstone refractometer mainly consists of a high refractive index prism (lead glass), a prism reflector lens, a scale (inner or outer scale), and an eyepiece.

Working Principle:
- The working principle of a refractometer is based on total internal reflection. The instrument measures the critical angle of a gemstone and directly converts the reading into a refractive index value.

The Conditions for Generating Total Reflection:
- The high refractive index prism of the refractometer must be an optically dense medium.
- The gemstone to be tested is a light sparse medium.
- Contact the liquid to establish good optical contact between the prism and the gemstone being tested.

Key Features:
- Large eyepiece design; Comes with a polarizing lens (for dimming), providing comfortable viewing and bright and clear effects.
- Stainless steel table-board; Made of metal stainless steel material, it is scratch resistant, durable, and corrosion-resistant.
- ABS power switch; ABS insulation material prevents power leakage and unnecessary damage.

Specifications:
- Product size: 6 x 11 x 3.4cm
- Net weight: 326.3g
- Material: metal material, optical glass
- Accuracy: refractive index accurate to 0.01
- Function: authenticity identification through refractive index
- Eyepiece diameter: 1.6cm
- Measurable range: refractive index within 1.30-1.81
- Table: low dispersion high hardness glass table

Package Included:
- 1 x Refractometer
- 1 x Magnifier
- 1 x External Flashlight