De Beers Group is the worldâs leading diamond company, with expertise in diamond exploration, mining, grading, marketing and retail. Together with our joint venture partners, we employ more than 20,000 people across the global diamond pipeline, with many of these people in our source countries of Botswana, Canada, Namibia and South Africa. Through our own stores and our partner jeweler locations, our beautiful diamonds and jewellery designs bring joy and meaning to lovers of diamonds all around the world.