Detailed Product Description

* HEAVY DUTY and precise because it made with metal and optical glass
* Durable, reliable and made by professional craftsmen
* Gemmologist tool for diagnosing optical properties of a gemstone
  (singly refractive or double refractive)* Size: Length: 80mm
* Diameter : 28mm
* Material: Optics glass, Metal Accessories:
* Handheld LED flashlight
* Lenght: 156mm
* Diameter: 24mm
* Power: AA battery x 2 (Batteries are not included)
A black cloth carrying case also included! Customers also can use the as its testing light source!