The installation of a Gemstone Steam Bath by SPA4® is a very effective way of giving your SPA that certain extra something. Gemstones not only have a wide range of positive effects on health and wellbeing, they are also very pleasing to the eye. Almost every civilization in the ancient world trusted in the healing properties of gemstones, and used their powers to treat various diseases and disorders. Gemstone Steam Baths by SPA4® feature amethyst, quartz and rose quartz. These three stones play important roles in gemstone therapy.