During your quest to keep your complexion all bright and glowy (not to mention ward off fine lines and wrinkles for as long as possible), you may have noticed a bevy of weird, misshapen-looking crystals hogging the spotlight on your social media feeds, and are probably wondering what they’re all about.

The crystals are part of a buzzy facial treatment called gua sha. Aficionados of this ancient Chinese practice claim it’s like a natural facelift that leaves your skin tighter, brighter, and all-around healthier looking.