Terra Firma Gallery is a truly unique art space located in downtown Sonoma. The gallery specializes in Shona sculptures, a specific stone artform that originated in Zimbabwe. The gallery is filled with lively works of art, including animal and human stone sculptures and brightly-colored oil paintings of African origin. While the gallery is best known for its Shona stone pieces, there is also a large collection of pearl and diamond jewelry. A free pearl grading class recently launched for the community.