A bezel - or collet - setting is where the setting metal surrounds the girdle of the gemstone. Learn more about the anatomy of a ring here https://www.acsilver.co.uk/acsnews/2019/05/06/anatomy-of-a-ring/
Of all my work, this is my favorite so far. I made it earlier this year and it is still inspiring me to try new things and not to pump out all the same stuff every day.