A large blue diamond has been found in a South African mine which experts believe could reach up to £30m at auction.

Petra Diamonds Limited is pleased to announce that it has recovered a 41.82 carat Type IIb blue diamond of seemingly exceptional quality in terms of both its colour and clarity at the Cullinan Mine in ...

According to the Natural Diamond Council’s Fancy Colour Diamonds report, Type IIb blue diamonds account for only a minute ...

Nestled in the north of Gauteng, about a 40-minute drive from Pretoria, lies the historic town of Cullinan, a destination now pulsating with artistic expression. Founded in 1902 as a mining town, ...

Exclusively used for coronations and State Openings of Parliament, the Imperial State Crown was originally made for the ...

Petra Diamonds Ltd, up 17% at 19.75 pence, 12-month range 10.39p-30.42p. Recovers a 41.82-carat type IIb blue diamond of seemingly exceptional colour and clarity at its Cullinan Mine in South Africa.

LONDON, Dec. 17, 2025 /PRNewswire/ -- Record-Breaking Diamonds, the latest in the Natural Diamond Council's (NDC) Diamond Reports series, explains how advances in technology are fuelling an ...

Petra Diamonds has recovered a 41.82ct Type IIb blue diamond of seemingly exceptional quality in terms of both its colour and ...

Petra Diamonds ( ($GB:PDL) ) just unveiled an announcement. Petra Diamonds has confirmed that, as of 31 December 2025, its issued share capital ...

London-listed Petra Diamonds has recovered a 41.82 ct Type IIb blue diamond of seemingly exceptional quality in terms of both ...

The 41.82-carat blue diamond is a Type IIb stone, regarded as among the rarest and most valuable in the world, and could ...

Discover the top 5 rarest diamonds in the world. Learn what makes these gemstones so unique, valuable, and extraordinary, ...