Gem Testing Tutorial: how to use the Refractometer and measure the Refractive Index of gems

If I had to pick one tool, this would be it. The refractometer is the backbone of gem identification. In this tutorial I walk you through refractive liquid handling, how to find the real shadow edge, spot readings on cabochons, and why birefringence is such a powerful clue. You will feel confident using it after this. I’m Nick, trained in colored gem identification at SSEF in Switzerland. Subtitles are included and edited for clarity. Website https://www.whatthegem.com Patreon temporarily paused TikTok   / what_the_gem   Instagram   / whatthegemstone   Contact https://www.whatthegem.com/contact Lab equipment and methods https://www.whatthegem.com/the-gem-lab Gem ID guide https://www.whatthegem.com/gem-identi...