The invention relates to an alloy of gold of at least 14 carats, characterized in containing 10 to 20,000, preferably 100 to 1000 ppm Zn, 10 to 20,000, preferably 100 to 1000 ppm Ga, 10 to 20,000 preferably 100 to 1000 ppm Ta, 10 to 10,000, preferably 90 to 950 ppm Pt, and 10 to 5000, preferably 5 to 100 ppm Ru, a cast object made from said alloy, a method for production thereof and use thereof for production of jewelry by the lost wax method.