How to Use the Polariscope
18:09
Easy Gem Tests Gemologists Actually Use
11:46
How do you KNOW what a gem is? [Refractometer Tutorial]
7:01
How to build a polariscope with common items to see the stress in different materials
8:30
Gem Identification - Polariscope Basic Use
3:45
Step-by-Step Polariscope Training: Learn the Essentials
15:08
Unboxing a Gemologist's Spectroscope
6:38
Gemstones go to Disco?! [ Polariscope Tutorial ]
17:17