Dr. M’zée Fula Ngenge: How De Beers’ Lightbox undermined natural diamonds

De Beers’ venture into the lab-grown diamond (LGD) market through its subsidiary Lightbox backfired, undermining its century-old luxury positioning around natural diamonds, according to the African Diamond Council (ADC) Chairperson Dr...

19 may 2025

LDB’s David Troostwyk: London still has major role to play in global diamond trade

London Diamond Bourse (LDB) President David Troostwyk has had a varied career in the diamond business. David sat down with Rough&Polished to discuss how his love of diamonds started, his career, the state of the diamond trade in the UK and globally...

12 may 2025

David Johnson: De Beers balancing lab-grown and natural diamonds rarity while pioneering ethical transparency

De Beers has been differentiating its lab-grown diamond brand, Lightbox, by positioning it as an affordable, fashion-focused product. Group spokesperson David Johnson told Rough & Polished that this is in contrast to how De Beers promotes natural diamonds...

28 april 2025

Who will bear the cost? Paul Zimnisky weighs in on U.S. jewellery tariff impact

The United States jewellery industry is facing a complex balancing act as new tariffs on diamonds force wholesalers and retailers to decide whether to absorb costs, negotiate with overseas suppliers (particularly India), or pass them on to consumers...

14 april 2025

Thataitsile Moremedi: South Africa's State Diamond Trader providing market access, exposure for nascent manufacturers

Although it is challenging for previously disadvantaged individuals to enter the diamond industry due to the financial barriers, South Africa's State Diamond Trader is providing nascent entrepreneurs with exposure, market access, and other support...

31 march 2025

Gemfields to resume targeted open-pit mining at Zambia emerald operation

08 may 2025

Gemfields Group is set to restart selective open-pit mining at its Kagem emerald mine in Zambia, aiming to boost the recovery of high-grade stones.

The operation—75% owned by Gemfields and 25% held by Zambia's state-owned Industrial Development Corporation (IDC)—suspended mining activities in January to focus on processing existing ore stockpiles.

While the upgraded processing plant has maintained expected production volumes in carat terms this year, the company notes these stockpile-derived emeralds have yielded a lower proportion of premium-quality material compared to direct pit mining.

The decision to resume mining at two key zones in the Chama pit follows encouraging results from recent emerald auctions, including last month's commercial-quality sale.

The restart will employ precision extraction methods to minimise waste while targeting high-value stones for future premium auctions.

Gemfields emphasised that any further expansion of mining operations will remain contingent on ongoing market conditions.

The strategic shift allows the company to capitalise on strong demand for quality emeralds while maintaining operational flexibility.

Mathew Nyaungwa, Editor-In-Chief, Rough & Polished