Optical refractometer

One of the fastest and most effective tool for gemstones identification, used to measure the gem’s refractive index. Thanks to the polarizing filter, it’s also possible to verify if the gemstone is birefringent. Advanced refractometry techniques allow to determine the optical axis number of a birefringent gemstone, and its optical sign as well. Use of a contact liquid required.

Features:

• cost effective item
• versatile tool for fieldwork
• protective case
• flashlight included