XNZJHPP Gemstone Refractometer Kit, Precise Measurement Tester with 1.300-3.000 RI Range and 0.001 Accuracy, Portable Tool for Jewelry and Jade Identification
XNZJHPP
Precision gemstone refractometer with optical systemss and LED backlight, measuring refractive index from 1.300 to 3.000, accuracy ±0.005, resolution 0.001. Constructed from hard aluminum alloy for a scratch-proof platform and ABS engineering plastic with triple insulation for safe, stable testing. No refractive oil required; simply place the sample on the measuring platform to determine if it's a uniaxial or biaxial crystal. Operates on total internal reflection principle, using refractive index as a key optical parameter to identify gemstone characteristics. Suitable for uniaxial and biaxial crystals, quickly identifying single and double gemstone, natural or synthetic stones, and minerals.
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