Gem Refractometer High Precision Diamond Zircon Gemstone Detector Measurement Range 1.30 ~ 1.81 External With LED Flashlight

Good luck with your favorite purchasesGem Refractometer High Precision Diamond Zircon Gemstone Detector Measurement Range 1.30 ~ 1.81 External With LED Flashlight 1. Quick and accurate identification of single biaxial gems. 2. Unique design, extremely low power consumption and easy to carry. 3. Through strict quality and safety standard test, long - term failure life. 4. High quality and high accuracy measurement results. Specifications Measuring range: 1.30-1.81,

Accuracy: ± 0.002,

Power supply device: LED light with AA battery;

Equipped with 3ml refractive oil (refractive index 1.78)