Bodhisattas The Personages Who Possess the Noblest Heart
Read | Download Preface Diamond is the hardest, most precious and most valuable mineral in the world. Most natural diamonds are formed at high temperatures between 900 and 1,300 °C and pressure at depths of 140 to 190 kilometers, between 45 and 60 kilobars in the Earth’s mantle. Carbon-containing minerals provide the carbon source and…