GeoMelt is a process by which dangerous, contaminated material (such as radioactive waste and heavy metals) is mixed with clean soil, a blend of industrial minerals, and/or glass frit and melted to create an extremely hard and leach-resistant glass product. Vitrification immobilizes nearly all of the inorganic contaminants (i.e., radionuclides and heavy metals) present in the initial mixture by incorporation into the glass matrix. Organic wastes in the melt are destroyed by pyrolysis, and gaseous contaminants released during the melting process are treated separately.