The Billion Dollar Secret Hidden in Common Clay

Geologists have discovered the world’s largest illite deposit beneath South Korea, revealing how one of Earth’s most common clay minerals could be worth billions. This geology documentary explores the Yeongdong mineral discovery, illite formation, hydrothermal alteration, sedimentary basin evolution, industrial clay uses, and why this strange common mineral is becoming increasingly important in modern technology, cosmetics, agriculture, drilling, and experimental battery research.