Ernest Oppenheimer was a prominent South African businessman and financier, born on April 22, 1880, in Germany. He is best known for founding the De Beers diamond company, which played a significant role in the global diamond industry. Oppenheimer's influence extended beyond diamonds, as he also invested in various mining ventures and became a key figure in the Anglo American Corporation. Oppenheimer's business acumen helped him build a vast fortune, making him one of the wealthiest individuals of his time. He served as the chairman of De Beers and was instrumental in establishing the company's monopoly over diamond production and distribution. His legacy continues to impact the diamond market today.