Zambia tax authority clears Gemfields’ Kagem mine of tax evasion

American geophysicist and Fulbright scholar, Stephen Haggerty, has found a new prickly, palm-like plant that seems to grow only on top of kimberlite pipes.

Unlike other precious gems, high-quality synthetic diamonds can only trade at around a 2 to 20 percent discount to naturally-mined stones.

If the miner buys any assets this year, it would be Rio's first acquisition in about three years.

The measure aims to stimulate production and attract investment in the sector, amid low international prices for the coveted gems.

After five consecutive months of decline, global mining exploration began showing signs of life in March, particularly in the gold sector, a new report shows.

After just three minutes of bidding, the final price was $22,090,000, including the buyer's premium.

The gem will be sold along with two other greater than 100 carat diamonds, also recovered at Lucara's Karowe mine.

The miner also said that revenue from rough diamond sales was set to reach at least $1.1 billion, even though its first-quarter rough diamond prices dropped by 3%.

A team of Australian scientists have, for the first time, identified the exact source of diamond-bearing rocks known as orangeites.