We all remember, as gemmology students, using a polariscope to look for “blinking” in a doubly refractive gem, or to see the distinctive flash of interference colours in some gems, or even a “bullseye” to distinguish quartz from other gems. These days many of these venerable instruments are dusty relics at the back of our testing bench. It’s time to dust them off and re-discover the joys of polarized light and perhaps to find some new applications.  In this webinar we will re-acquaint ourselves with the many benefits of a polariscope. Join Duncan Parker as he talks about analyzing gemstones through the polariscope