Onyx Facial massager, best for skin repair 

One only facial massager in this auction

Onyx is one best gemstones as the stone is naturally colder than the traditional rose quartz massager and hence more beneficial to your skin.

Many sites sell these as jade because of green colour

Do Gemstone face rollers really work?

Regular and correct use of crystal facial rollers has a whole host of pleasant-sounding benefits that ultimately end in better skin. ... The oxygen from increased circulation allows the skin to release toxins and calms inflammation. Improved circulation from regular massages can make skin look brighter and more awake.