Stones and minerals act as a source of energy, each providing its own vibration. For this reason they work well as Feng Shui symbols and harmony-building materials.
Their vibration patterns make stones well suited to assist in the activation, stimulation and harmonization of the "Qi", or energy, of a room. 
When, for example, the Ba Guas shows poor or scarce areas of energy in a room, or there is a specific important life issue to be activated and supported, the appropriate stone mandalas can help to find balance.
If the stones are to help with a physical ailment, they can also be worn on the body, in combination with a specific pattern in a room.
The company MCT is knowledgeable of the 30 year long research history of healing stone therapy thanks to the guidance of healing stone expert Michael Gienger and of the most recent developments in Feng Shui thanks to expert Martina Fuchs.
Ba Gua: Analysis instrument (compass - Ba - Gua) that identifies the energy zones in rooms, houses, and landscapes.