At what depth beneath the Earth's surface do diamonds typically form?

Diamonds are formed under high-pressure and high-temperature conditions, which are typically found deep within the Earth's mantle. The formation of diamonds generally occurs at depths ranging from approximately 90 to 140 miles beneath the Earth's surface. At these depths, the extreme conditions enable carbon atoms to bond in a crystal lattice structure, resulting in the formation of diamonds.

This particular range is crucial because it is directly linked to the geological processes, such as subduction and mantle convection, that bring diamonds closer to the surface over geological time. Understanding the formation depth of diamonds is essential for geological studies and for the exploration of diamond deposits.