Gemstone polarizer / Jewellery identification instrument / table polarizer / crystal gem identification instrument / interference ball Polarization mirror is a simple instrument, which is very useful to determine whether gemstones are homogeneous or heterogeneous, this is one of the conventional auxiliary identification instruments for gemstones. large diameter lens conical lens is used to observe the interferogram of heterogeneous gemstones.Long life, imitation incandescent lamp warm white LED cold light source, easy to observe interference mapAnd more conducive to the protection of polarizer. 100% Satisfaction Guarantee: We also provide you with a 100% risk-free satisfaction guarantee, so that you can buy with confidence, if you have any questions, please feel free to contact us, we will solve the problem for you!