Diamonds originate deep within the Earth's mantle, typically 140 to 190 kilometers beneath the surface, subjected to intense pressure and temperature. They form as carbon atoms crystallize under these extreme conditions over vast periods.

Mined diamonds originate in the Earth's mantle. The exact time varies as some form quickly, while others take millions of years. Created by intense heat and pressure, diamonds are brought to the surface through volcanic eruptions or subduction zones. They can also result from asteroid impacts.

Natural Diamond Formation: The process occurs over millions to billions of years in the Earth's mantle. Carbon atoms undergo intense pressure and heat, crystallizing into diamond structures. These diamonds can move closer to the Earth's surface through volcanic eruptions via kimberlite or lamproite pipes.