Explosive eruptions from deep within the Earth’s mantle, triggered by the breakup of supercontinents, could propel diamonds to the surface, potentially revolutionizing the way precious stones are sought, according to researchers. A recent study by an international team of scientists published in the journal Nature digs into the phenomenon of diamond-rich magma, known as “kimberlites,” originating from depths up to 100 miles beneath the Earth’s surface. These magmas have explosively erupted in the planet’s geological history. Kimberlites are commonly found in the oldest and thickest parts of co…