Alluvial mining of deposits of sand ... plus money-saving tips with our free twice-daily newsletter Sign up Rough, or raw, diamonds vary in size, shape and quality. About 30% of diamonds are ...

NEW DELHI (Reuters) - India's state-run miner NMDC is expected to extract 6,500 carats of diamonds, worth $3.4 million, this fiscal year from ores in a mine near a tiger reserve, after receiving ...

“The proposed ban on the export of raw ores as also contained in SB 2826, however, is the last thing our country needs. Its intended purpose of compelling mining companies to build processing ...

one of the world’s leading diamond mining companies. Harry Oppenheimer was a fascinating character in the raw materials world, running one of the leading mining companies. In his 1958 classic ...