De Beers Diamond Cartel
De Beers seen as a multiple brand company
How an Ad Campaign Invented the Diamond Engagement Ring - The Atlantic
De Beers Rolls Out 'Diamonds from DTC' Origin Program
The 15-Carat 'De Beers Blue' Diamond Fetches $57.4 Million
De Beers Group rough diamond sales for Cycle 1, 2021 – De Beers Group
De Beers - Wikipedia
Kitco Commentary
Coming soon to Gemporia - Diamonds with the De Beers Code of Origin