Gareth Penny, managing director of the De Beers Group, discussed the supply of diamonds to world markets.

De Beers, the world’s largest producer of rough diamonds, said prices had increased an average of 16 percent since the beginning of the year.

De Beers, the world’s largest producer of rough diamonds, said prices had increased an average of 16 percent since the beginning of the year.

Botswana’s economic development has been aided by diamonds and by De Beers’s sense of corporate social responsibility.

Developers’ plans to transform the area’s skyline with new spaces for residential and office use cause existing tenants to fear they will be priced out.

Manufactured diamonds have become indistinguishable from their natural counterparts.

Diane Irvine is the chief executive of Blue Nile, an online diamond retailer.