While the number of smokers in the United States has declined dramatically in recent years, miners have yet to kick the habit, says a federal study. Reuters reported Thursday on the report, which says that 30% of mining, hotel/motel and food services smoke. The study, by the Centers for Disease Control and Prevention, analyzed data from 2004 to 2010.

The Zimbabwe Guardian reports that at least 137 mining companies are risking losing their mining licences for refusing to comply with the country's new indigenization regulations. Affected companies include Anglo-American, Murowa Diamonds and Metallon Gold, according to the newspaper, which notes that 38 companies have complied. The government of Zimbabwe, the country with the largest platinum reserves outside number one producer South Africa, is demanding 51% of all foreign-owned mines operating in the country under its so-called indigenization laws.

In yet another buying spree, China is going after another African copper producing firm to acquire its abundant copper production. Minmetals Resources Ltd. of China is poised to buy Anvil Mining of Congo for $1.31 billion to secure copper mine production output in Africa amid the recent fall of the commodity's prices in the world market.

Business Insider reports that the heart of the American coal industry, Central Appalachia, could soon be a shadow of its former self. According to the US Department of Energy, the amount of Appalachian coal will be less than half that mined in 2008 within the next three years, says Business Insider, because most of the easy-to-reach resources have been exhausted.

Spot gold and U.S. gold futures rose 1 percent on Friday after German approval of a stronger bailout fund to counter the euro zone debt crisis.

A recent journal article says that coal-fired power is harming the US economy more than it is helping it. The article in the American Economic Review, titled “Environmental Accounting for Pollution in the United States Economy,” essentially states that coal plants are responsible for a quarter of gross external damages (GED) to the US economy, measured in terms of sickness and death caused by major pollutants such as sulphur dioxide, nitrogen oxides, ammonia and volatile organic compounds (VOCs).

Country risk is one of the most important factors in mining, and a new study ranks Australia as the seventh best place to mine in terms of risk. Topping the list was Finland, which got a low score of 7, followed by Chile (9.7), Burkina Fasso (11), Botswana and Sweden (11.3), U.S. (11.4), Brazil (11.9), Canada (12.4) and Argentina (13.1).

One shouldn't compare pears and squares but there is no better indication that coloured diamonds are spearheading record auction prices than news that a yellow weighing slightly less than the 33-carat flawless D-colour Liz Taylor wore every day, is expected to fetch three time as much as the Hollywood legend's gem when it goes on sale next month.

Low levels of zinc and copper are associated with miscarriages in pregnant women, Digital Journal reports. Scientists at the University of Granada compared data from two groups of women — with one half having suffered miscarriages and the other half who had normal pregnancies — and found that lower levels of zinc and copper in the women who had miscarriages, suggesting a deficiency of one or both elements could be involved.