Jewelry Refractometer, Gemstone Refractometer, Jewelry Tester Identification Tools, 28mm Large Lens Retractable, Ruler Range 1.35-1.85, Built-in Led Light Source, for Jewelry

Product Specifications: Measurement accuracy: ≤ ± 0.002 Ruler range: 1.35-1 black background high contrast ruler, the interface is clearer source Light source: Built-in quasi-monochrome LED light source, wavelength 589 soil 3nm light Dimensions: 140mmX42mmX95mm (large size) Product weight: 561g Power switch: push button switch, two-speed brightness adjustment switch Countertop: All stainless steel countertop, easy to clean Packing List: Jewelry refractometer * 1

• Jewelometer: thisometer is designed to measure the refractive index of solid materials and can accurately measure how light ised through the stone.
• Easy to read: with 28 mm eyepiece, retractable diopter adjustment, internal scale display, digital range 1.35-1. 85 mm, with 2-speed, accurate reading
• High precision: high precision, easy to operate. Lightweight, small size, easy to carry. Provide key recognition to distinguish between opaque and transparent.
• Material: stainless steel desk with wear-resistant prism, easy to clean. 2 power supply methods
• Application function: Quick and accurate identification of single and double precious stones, moissanite/diamond/colored precious stones, designed to measure the refractive index of precious stones.and solid materials.