Volcanic facial tools are made from natural volcanic glass (black obsidian) and from ABS plastic (Acrylonitrile Butadiene Styrene).
They commonly address puffiness and facial sculpting by supporting lymphatic drainage and circulation, help soothe and decongest the skin, and provide oil-control/mattifying effects.
Many volcanic stone tools can be cooled or gently warmed: chilling them (for example in the fridge) gives a refreshing, de-puffing effect, while gentle warming (such as in warm water) can boost circulation, relieve muscle tension, and energize the skin.
They are marketed as suitable for all skin types, explicitly including sensitive, oily, mature, normal, dry, and combination skin.
They commonly appear as traditional face rollers, teardrop-shaped gua sha tools, and stick-style rollers; some offerings are sold as two-piece sets that combine a gua sha and a roller.
They’re described as removing excess oil and mattifying the skin without disturbing makeup; users report the tools help preserve foundation and reduce shine.
Most listings show a package quantity of 1, so these tools are typically sold as a single unit.