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

Caledonia sees Blanket mine expansion after better-than-expected drilling

01 february 2024

Caledonia Mining’s recent in-fill deep drilling yielded grades and widths that exceeded initial projections, suggesting that the Blanket Mine's lifespan in Zimbabwe will be extended.

Drilling is currently focused on the Blanket and Eroica ore bodies, where crosscuts have been mined to allow optimal access to drill the deeper zones of the steeply dipping ore bodies.

"Our ongoing drilling campaign continues to demonstrate encouraging results, further improving our confidence in the Blanket resource,” said Caledonia chief executive Mark Learmonth.

“We anticipate that the positive grades and widths will result in an increased overall resource, which in due course should result in the extension of the existing life of the mine.”

A total of 7,652 metres of drilling from June 2023 to the end of December 2023 indicates that the existing Blanket and Eroica ore bodies have grades and widths that are generally better than expected.

Gold grades at depths of about 1,000 metres beneath the surface at the Blanket and Eroica ore deposits varied from 3.62 to 8.8 grammes per tonne (g/t) across widths of 4 to 16 metres.

Mathew Nyaungwa, Editor in Chief of the African Bureau, Rough&Polished