How diamonds

  • How diamonds form The pressure and very high temperatures are the basic conditions that make up diamonds. These environmental conditions are located in limited areas 90 miles, or 150 kilometers, below the surface of the earth where the temperature reaches 2000 degrees Fahrenheit, or 1050 degrees Celsius. The formation of crystalline carbon called graphite from hexagonal to triangular diamonds, and diamonds come out to the surface of the earth by means of sulfurberlite tubes and lambarite produced by volcanic eruptions.