Amethiste is a way of building, where only the principle is fixed. The house can be implemented in many variants. Amethiste is cheap and easy to build yourself with a simple design. Straw bales are used in the roof as well as in the facade as insulation. One variant has been developed as a pre-sawn building kit. The inside width of the house is 5.5m. The length can be determined in steps of 1 meter. The house has a ground floor and a sleeping floor. The roof can be covered with slates, pans or sedum.