This program explains the formation, chemistry, variations and allure of the most notable gemstones; diamonds, emeralds, sapphires, rubies, jade and opals.
44min
April 24, 2018
02. Metals
Metals: What is it about the nature of metals that have made them a pillar of human civilization?
44min
April 24, 2018
03. Power
Power: Drill underground to see the treasures that power our world—today and into the future.