The Cullinan III and IV brooch has an estimated worth of between £50 and £180 million. Elizabeth inherited the diamonds from her grandmother, Queen Mary. Queen Elizabeth II wore her share of ...

(Reuters) - Petra Diamonds, which has the world's third-largest resource of diamonds, said on Wednesday it had delayed the sale of gems from its Cullinan Mine in South Africa until there was greater ...

(CNN) — A massive 2,492-carat rough diamond, believed to be the second biggest ever found, has been unearthed in Botswana, according to a mining company. The huge stone is thought to be the biggest ...

The illustrious Cullinan diamond mine, flagship of London-listed Petra Diamonds, is not only famous for hosting the largest gem diamond but a flurry of reports is now affording sky-high status to the ...

JOHANNESBURG (AP) — A mining company says it has found a rare blue diamond in South Africa. Petra Diamonds says the 29.6-carat diamond came from the Cullinan mine, source of some of the world’s most ...

LONDON (Reuters) - Petra Diamonds Ltd said it had recovered an "exceptional" 122.52 carat blue diamond at its Cullinan mine in South Africa, just months after it sold a 29.6 carat blue diamond from ...