Diamonds created in lab with pressure equivalent to 640 elephants on shoe tip

An international team has recreated diamonds found in an engagement rings and Lonsdaleites at room temperature using a diamond anvil, which is a high-pressure device that compresses small pieces to extreme pressures. They used carbon crystallize for the experiment and then provided a twisting or sliding force of pressure known as ‘shear. Both diamonds formed together as bands with a core shell structure following the high pressure treatment at room temperature, which experts said is ‘equivalent to 640 African elephants on the tip of a ballet shoe.