Traditionally, diamond production involves converting carbon at enormous pressures and temperatures, where the diamond form is stable, or by using chemical vapor deposition, where it is not. Professor ...

Most natural diamonds have ages between 1 billion and 3.5 billion years. Diamond is the only gem with a single element. Do ...

A newly studied rough diamond from Botswana looks as if it has split in two, with one side pink and the other clear. The stone weighs 37.41 carats, measures about 1 inch long, and stands out as the ...

A pair of diamonds that formed hundreds of kilometers deep in Earth’s malleable mantle both contain specks of materials that form in completely opposing chemical environments—a combination so unusual ...