What is the current status of De Beers? Is it still a monopoly? If not, who owns all the diamonds now? How did that happen? - Quora
De Beers - Monopoly Broken Australian Diamond Portfolio
Monopoly Examples In A Nutshell - FourWeekMBA
Is De Beers still a monopoly?
De Beers' Market Share Falls in 2019, Hides a Surprise
Where Do Diamonds Come From And Where They Are Found?
Where Do Diamonds Come From And Where They Are Found?
How has De Beers kept their world monopoly of 95% on diamonds for so long and how is it considered a non-monopolistic enterprise in the US? - Quora
The History of De Beers and Diamonds
Kitco Commentary
Rolex Just Commented On It's Supply And Distribution For the First Time
De Beers