Nosiphiwo Mzamo: South Africa’s State Diamond Trader to buy diamonds from other African countries

South Africa’s State Diamond Trader (SDT) is set to buy diamonds from other African countries starting with Botswana. SDT’s chief executive Nosiphiwo Mzamo told Rough & Polished’s Mathew Nyaungwa at the country’s inaugural diamond show, which...

10 february 2025

Edahn Golan: Halo effect from lab-grown diamonds driving high demand for large, 2-carat natural stones in the U.S.

Edahn Golan, owner of the eponymous Edahn Golan Diamond Research and Data, told Rough & Polished's Mathew Nyaungwa in an exclusive interview that their research found a halo effect from lab-grown diamonds. He said the trend among lab-grown diamond...

27 january 2025

Paul Zimnisky: We will see a modest recovery in natural diamond demand and prices in 2025

According to Paul Zimnisky, an independent diamond and jewellery analyst and consultant based in the New York metro area, the natural diamond industry will see a modest recovery in demand and prices this year. Zimnisky said a moderate recovery would...

13 january 2025

African Diamond Council makes traceability its top priority, wants KP to embrace Authentia.io

The African Diamond Council (ADC) has made traceability its foremost priority and has been contributing to a traceability solution called Authentia.io for the last three and a half years, which is now ready to globally satisfy the traceability...

16 december 2024

Gaetano Cavalieri: CIBJO leading the jewelry industry on critical issues

One of the gem and jewellery industry’s most well-known and respected personalities, Dr. Gaetano Cavalieri, has been the president of the World Jewellery Confederation (CIBJO), for the past 23 years. CIBJO is the oldest international organisation...

09 december 2024

Mantengu to produce first chrome concentrate this month

06 june 2023
Mantengu Mining has commissioned the first of three chrome processing plants at its Langpan mining operation, in South Africa’s Limpopo Province.
This follows 18 months of planning, which included a competent person's report and the hiring of Jacques Pretorius as Langpan's general manager.
The plant's first delivery of chrome concentrate is scheduled for June 8 or later.
Mantengu chief executive Mike Miller said the initial chrome mill was built to accommodate a monthly output of 30 000 tonnes (t), or 70 t/h. 
However, the new chrome plant's commissioning has increased production capacity to 36 000 t per month, or 100 t/h.  
The plant is projected to generate around 18 000 t of chrome concentrate per month, with a chrome percentage ranging from 42% to 44%.
The second plant will have a monthly capacity of 30 000 t, while the third plant will have a monthly capacity of 14 000 t.
Mantengu intends to commission both plants in August.
The Langpan chrome reserve is estimated to be 2.17 million tonnes.

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