Lockheed Martin is one of the largest producers in metal 3D printing, aerospace and defense. This month, it has filed a patent application for a 3D printer that prints diamonds. They will be synthetic and will be produced from poly(hydridocarbyne), a carbon-based pre-ceramic polymer with structural similarities to diamonds. The corporation aims to use this 3D printer to produce diamond drill heads with complex geometries, super-strong, lightweight saws, armor and knives. But as well it can be engaged to print jewelry diamonds in any shape and size.