Everyone knows what a diamond looks like: a clear, polished stone with smooth facets, full of flash and sparkle. But not everyone knows that diamonds don’t start out that way—it takes a series of special circumstances (and a couple billion years!) to turn a diamond in the rough into that brilliant gem glittering on your finger.
Diamonds are unique because of the special conditions that create them. They are formed in what’s known as “diamond stability zones.” These zones are found deep within the upper mantle, over 100 miles below the Earth’s surface, with temperatures reaching 2200 degrees Fahrenheit and up to 725,000 pounds of pressure per square inch.
Watch this video to learn exactly how are diamonds made!