Botswana Diamonds finishes drilling at Thorny River project

Ratings agency worries about exposure of much-diminished mining company to Africa; after restructure responsible for 54% of earnings.

The permit marks another key step in the process of moving towards development of the 1.45 million carat diamond resource in the West African country, said the company.

The miner is completely exiting coal and selling several assets, to focus only on copper, diamonds and platinum.

Australian company says extremely rare Type 2a D-colour stone is the biggest diamond ever found in Angola.

The massive rock worth about $1.5 million.

Canada's Lucara Diamond had launched a a competition to name the rock earlier this year.

Mining in the area of the Andes mountains right above the continuous tree line had been prohibited since 2011, but concessions granted before such ban had continued to date.

The board's recommendation still needs to be approved by Canada’s Northwest Territories authorities.

FTSE 100 reweighting to take place in March.