can you use a rose quartz roller without serum?

Absolutely! You can use a Rose Quartz Roller without serum, moisturizer, or anything else but just on your bare face. It'll still feel very refreshing and relaxing.

how to use rose quartz roller under eyes

If you have a Rose Quartz Roller with a bigger side and a smaller side, make sure to use the smaller side. Then start rolling gently in an upward motion under your eyes towards your temples.