type diamond
http://raymondapti970.edublogs.org/2019/09/13/the-most-common-diamond-types-names-debate-isnt-as-black-and-white-as-you-might-think/
The heat that generates the diamond may even exceed 1,200 degrees Celsius. Nearly anything below 400 levels Celsius leads to graphite, not diamond. Take a look at heat. It corresponds to the heat, the enthusiasm