Oddly enough, as Mao points out, there is nothing new about manmade diamonds. The principle is very simple: You just need methane gas and heat. Methane, which you can even get from cow dung, includes carbon. You heat the methane to break it down, then figure out a way to make the carbon settles, and there you are.
毛河光指出，人造鑽石其實不是什麼奇蹟，原理十分簡單，只要將沼氣（主要的成分為甲烷，牛糞中的細菌也可以製造甲烷）加熱到高溫，再想辦法讓碳沈澱下來即可。