The main flaws were that it proved very difficult to ensure the growth of a "monocrystal" (also known as a "single-crystal diamond," meaning that the molecules arrange themselves into a single pattern as they are stacked throughout the material), and that it took three months to grow half a carat. The process consumed immense amounts of electricity and proved impractical.
原因是，CVD 過程中很難控制鑽石單晶（指分子排列序列相同）成長，而且 3 個月才長出半克拉，耗費電力，根本不實用。