Earth’s plate boundaries may nurture diamond formation
High-pressure, high-temperature experiment supports idea about gems’ origins
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2013/12/gp_daimond_free.jpg?fit=860%2C460&ssl=1)
DEEP DEVELOPMENT Diamonds (dark grey) begin to form from minerals containing iron and magnesium (white) and from carbon-oxygen compounds called carbonates (light grey) in a scanning electron microscope image.
Y.N. Palyanov et al/PNAS 2013