MURFREESBORO, Ark. — Visitors to the Crater of Diamonds State Park have unearthed an early 20th-century wooden water pipe that a park interpreter says once was used to help mine gems. The 4-foot ...

The company’s business unit Aikhal Mining accounted for over 30% of Alrosa’s total raw diamonds in 2016. It generated 12.2 million carats, worth $1.2 billion, according to the firm.

Pit-mining is the most common way to recover diamonds. In pit mining, heavy machinery, hydraulic shovels, and trucks are used to mine diamonds from the depths of kimberlite pipes Wikimedia Commons ...

A21 is the fourth diamond pipe of the project and was opened by Rio Tinto in 2018. The company made the decision to go ahead with Phase 1 in February 2023, investing US$40 million.

Alrosa’s (MCX:ALRS) International mine produced this month the largest gem-quality diamond seen in the past two years. In a press release, the world’s top diamond miner by output revealed that ...

MOSCOW. July 8 (Interfax) - Alrosa has begun work at the Karpinsky-2 diamond deposit in Arkhangelsk Region, the Russian diamond miner reported. This pipe, the third of six kimberlite pipes at the ...

The pipes narrow as they descend into the Earth as far as 100 to 150 miles. ”Worldwide, the only types of rocks to have contained diamonds have been kimberlites,” Van Alstine said.

Three diamonds weighing a total of 1.75 ct and described as being of “good shape and good colour” were recovered from the No 7 pit at the Se251 kimberlite pipe, while one diamond weighing 0.1 ...

BANGALORE, Aug 24 (Reuters) - Gem Diamonds Ltd posted a steep fall in profit but said recovering diamond prices in Australia could lure it to restart production this year at a pipe that was on ...