Radius: Off
km Set radius for geolocation

Diamond Clarity Guide

Most natural diamonds are formed at high temperature and pressure at depths of 140 to 190 kilometers (87 to 118 mi) in the Earth’s mantle.  Carbon-containing minerals provide the carbon source, and the growth occurs over periods from 1 billion to 3.3 billion years. Because they are formed deep within the earth, under extreme heat and pressure; virtually […]