CNBC’s Bob Pisani traveled to South Africa to show us how gold goes from particles to gold bars.He followed AngloGold Ashanti’s gold from start to finish, diving deep into the Earth to watch miners at the world’s deepest mine. Workers there pull up 5000 metric tons of earth per day, which yields as much as 1,700 ounces in gold.
Then he visited the Rand Refinery, which has refined nearly a third of the gold mined since 1920. By the end of the process, the purity of the gold bars Rand produces exceeds 99 per cent.
Carletonville, South Africa, is home to the world's deepest mine. Called TuaTona, it stretches 2.4 mi into the earth.
Workers have to ride two elevators to get down to the bottom. The first elevator stretches 8,400 feet, making it one of the longest elevators in the world.
Without its cooling system, the mine would reach more than 150 degrees Fahrenheit (65.5 degrees Celsius).
Rough bars from mines all over the world end up at places like the Rand Refinery, which has refined 50,000 tons of gold—or nearly one third of the gold mined globally—since 1920/
NOW WATCH: Money & Markets videos
Business Insider Emails & Alerts
Site highlights each day to your inbox.