Fable gem jewelry portable polariscope FPP-30 with Black aluminium alloy shell.   

The polariscope can quickly determine whether gems are singly or doubly refractive .sometimes ,use the interference figure sphere to view the interference figure spere to view the interference pattern .

Product Description:

1. Black aluminium alloy shell.                                

2. Diameter of polaroid: 30mm.                                      

3. Rotation type sample room

4. Long life white LED cold light source.                                     

5. Build-in 3V button type battery

6. Leather sheath packaging