Frik Els , Editor

Business Day reports De Beers expects its South Africa unit to produce 6.5 million carats this year, 1 million less than last year as the effects of mine disposals filter down. De Beers has since 2007 sold several of its South African mines including Cullinan, Jagersfontein, Namaqualand and Finsch. The board is expected to sign a potential R15bn ($2 billion) investment to extend the life of its flagship Venetia mine when a feasibility study ends next year – it would be the company’s biggest South African investment in decades.

Valued at twenty times the price of a white diamond, pink diamonds are also extremely rare with only around 50 or so put out to tender each year. Pink diamonds comprise 0.03 per cent of global diamond production and 90% come from the remote Argyle mine in Australia, owned by Rio Tinto. For every million carats of rough diamonds produced at Argyle, less than one carat will be suitable for the tender which this year will include the three-heart shaped Argyle Semper Suite (pictured).

London-listed Gem Diamonds announced Wednesday it has found the world’s 15th largest white diamond at its Letšeng Mine in Lesotho, which is fast-becoming the richest source of large diamonds in the world. The company  said the type II D 553 carat colour diamond diamond is being analyzed in Antwerp at the moment and has not been named.  Without the occasional large diamond find, the Letšeng pipe would probably be a marginal deposit, but the mine, 30% owned by the King of Lesotho, has also yielded the 603 carat Lesotho Promise turned into a $12.4 million necklace (pictured). The 493 carat Letšeng Legacy sold for $10.4 million in 2007 and the 478 carat Light of Letšeng went for $18.4 million in 2008.

China's 27 largest steel companies saw a 15.7% decrease in the first-half profits from a year earlier for a combined profit of $1.6 billion, according to the Shanghai-based researcher Wind Info, as soaring iron ore costs squeezed margins. The woes of China's steelmakers, which have been switching to cheaper low grade ore to cut costs as prices top $180/tonne, are in stark contrast to profits at miners. Last week results for BHP Billiton showed its iron ore division accounted for the bulk of its record $22 billion in profits. BHP, Vale and Rio Tinto – control nearly 70% of the 1 billion tonne annual iron ore seaborne trade and dominate price talks.

Gold for December delivery rose 2.6% or $46.50 to $1,838.20 an ounce in New York on Tuesday, making up some of the ground the precious metal had lost since coming close to $1,900 last week. An inflation hedge, bullion is up nearly 30% so far this year as cheap money floods markets thanks to the US Federal Reserve's loose policy. This week minutes showed the central bank had considered tying interest rate policy to a specific unemployment level, an unprecedented move. US unemployment was pegged at 9.1% in July versus a post-WWII average of 5.7%.

According to a new MarketResearch.com report coal accounts for over 40% of total global electrical generation – more than 1,700TWh in 2010 – and the installed generating capacity in 2010 was around 1,500GW out of a world total of 4,500GW. Global coal consumption advanced 7.6% last year and at a faster pace than crude oil, natural gas and nuclear, according to statistics published by oil giant BP.

Sinocast reports China's market for rare earths has begun to see negative effects of its crazy growth this year with an increasing number of downstream players finding it difficult to make deals despite price cuts. Prices of certain elements such as cerium used to polish TV screens and lenses are down 10% over the summer after months of break-neck price hikes. Reuters reports China is in the midst of a crackdown on illegal miners and processors and the busy black market trade that have sprung up, but has struggled to impose a REE production cap, with actual annual output exceeding official quotas by 40% to 50% since 2007.

China said on Wednesday that it would appeal against a World Trade Organisation ruling that it illegally restricted exports of certain rare and speciality metals and minerals including bauxite, coking coal, fluorspar, magnesium, manganese, silicon metal, silicon carbide, yellow phosphorus and zinc. The United States, European Union and Mexico argued that the minerals are key inputs for numerous industries and any cut in supplies could lead to sharp spikes in world prices. The complainants fear a similar situation to rare earths where the price of certain elements have tripled thanks to export cuts and China's virtual monopoly on production.

Potassio do Brasil, partly owned by Canadian merchant bank Forbes and Manhattan, is seeking to renew negotiations with Brazil's government over rights to a potash reserve in the Amazon currently held by state oil company Petrobras adjacent to what it called a 'world class' potash discovery last week. The Potassio do Brasil mine will take $4 billion to develop and follows news earlier this month from Toronto-listed Verde Potash which announced a 1.1 billion tonne resource at its Amazon Cerrado Verde project that is suitable for open pit mining. The discoveries come as Brazil readies a new mining royalty regime – in certain instances doubling the rate – which would be managed by government decree. Mining investment in the world's fifth largest economy is also predicted to accelerate to $68.5 billion through 2015.

The Canadian Environmental Assessment Agency announced on Monday it is conducting a comprehensive study, which is a type of environmental assessment, for the proposed Canpotex Potash Terminal Project located on Ridley Island, in the Port of Prince Rupert, British Columbia. The Agency is also making available $50,000 under its participant funding program to assist groups and individuals to take part in upcoming steps in the federal environmental assessment of this project. Construction is projected to start in 2013 and to be completed three years later.