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Dmitry Fedorov: I want our jewelry to be displayed at a museum in the future

Dmitry Fedorov is the founder of the eponymous jewelry house. His main focus is the creation of Orthodox-inspired premium luxury jewelry of high artistic merit. He told Rough&Polished about his journey in the jewelry industry, about choosing the ‘Orthodox...

28 october 2024

Responsible business practices ‘no longer optional’, says WDC President Feriel Zerouki

The president of the World Diamond Council takes time out of her busy schedule to tell Rough&Polished readers about the critical work of the WDC. Zerouki, the first female present of the body, which includes all the important industry organizations among...

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James Campbell: Botswana Diamonds optimistic as it enters uncharted territory of using AI for mineral exploration

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07 october 2024

Artur Salyakayev: For me, happiness is freedom to make my ideas happen and create valuable products

Artur Salyakayev is an art entrepreneur, founder of the International Jewelry Academy (IJA) and the INCRUA jewelry company. He has initiated and developed successful projects in jewelry industry and services sector. He is also a leading expert...

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Subsidiary of ALROSA supplied 27 X-ray sorters for the Cullinan Mine

29 january 2018
Bourevestnik, Inc., subsidiary company of ALROSA, supplied and commissioned a set of 27 X-ray luminescence sorters at the new recovery plant of the Cullinan mine in South Africa.
The Cullinan Mine is owned 74% by Petra Diamonds Limited and is renowned as the source of very rare blue diamonds and large, high quality gem diamonds, including Type II stones characterized by low nitrogen content (their volume not exceeding 1−2% of the world production).
The decision to implement Bourevestnik’s sorters was taken by Petra Diamonds after assessment and comparison of diamond recovery technologies available in the market relative to the unique characteristics of the Cullinan ore. This process confirmed the high recovery efficiency of all types of diamonds by the Bourevestnik sorters, including low-luminescent Type II diamonds characterized by low luminescence level under X-ray exposure.
As part of this project, Bourevestnik has supplied 27 sorters, specifically upgraded as per Petra Diamonds’ requirements, for primary recovery, reconcentration and final concentrate treatment of diamond bearing ore, with a sizing range of -75 mm +1 mm. Processing of Run-Of-Mine material with a size fraction of -75 mm +6 mm is done directly via X-ray sorters without the application of Dense Media Separation. In addition to supplies of equipment, Bourevestnik, Inc. has performed commissioning, technical personnel training and arranged consignment stock of spare parts.
Bourevestnik, Inc. is one of the world’s biggest designers and manufacturers of X-ray sorters for diamond recovery and is a subsidiary of “ALROSA” (PJSC).