RHG181 1.30‑1.81 Professional Gemstone Ldentification Gem Refractometer

1、Specially designed for measuring the refractive index of gemstones and solid materials. 

2、Lightweight and compact, easy to carry. 

3、This refractometer features high accuracy and easy operation. 

4、Identify single and double gems quickly and precisely. 

5、Low battery consumption for long service time.