Design a 3D model of a mysterious alien artifact in the shape of a perfect cube, floating slightly above a circular base. The cube's surface features intricate, glowing glyphs and symbols, resembling an unknown alien language. Each face of the cube showcases a unique pattern with a mix of engraved textures and glowing sections. The material should appear as dark, polished metal with a subtle iridescent effect, shifting between shades of purple, green, and blue when viewed from different angles.