SourcingMay 02, 2022
Petra Looking to Sell One of Its Mines in South Africa SourcingMay 09, 2022
First Diamonds from Sierra Leone’s Tongo Mine Coming to Market
Australian company Newfield Resources is developing the mine and will sell its production through Bonas Group in Antwerp.
An entrance to the Tongo Diamond Mine in eastern Sierra Leone. Bonas Group will hold a tender sale of the first rough diamonds from the mine later this month.
Antwerp—The first sale of rough diamonds from Tongo, a new diamond mine in Sierra Leone, will take place later this month at the Bonas Group offices in Antwerp.
Newfield Resources Ltd., the company developing the mine, announced in late April it had inked an exclusive diamond sales and marketing agreement with Bonas for the mine’s production.
Via its partnership with Bonas, Tongo goods will be tracked from mine to market using Sarine Technologies’ traceability program, Newfield said.
The mine, which has been in the works for more than decade, is “well known for its high-quality material,” Bonas said.
Tender viewings of the Tongo material will take place on the first floor of the Bonas Group offices in Antwerp between May 16 and 20.
The sale is scheduled to close May 20 at 1 p.m. CET/7 a.m. EDT and will be an online, highest bid tender on Newfieldbids.com.
Bookings for the tender are invitation-only, but requests can be submitted to Bonas Antwerp. Interested clients are requested to call the office at +32 (0) 3233 7080.
Related stories will be right here …
Newfield Resources Ltd., the company developing the mine, announced in late April it had inked an exclusive diamond sales and marketing agreement with Bonas for the mine’s production.
Via its partnership with Bonas, Tongo goods will be tracked from mine to market using Sarine Technologies’ traceability program, Newfield said.
The mine, which has been in the works for more than decade, is “well known for its high-quality material,” Bonas said.
Tender viewings of the Tongo material will take place on the first floor of the Bonas Group offices in Antwerp between May 16 and 20.
The sale is scheduled to close May 20 at 1 p.m. CET/7 a.m. EDT and will be an online, highest bid tender on Newfieldbids.com.
Bookings for the tender are invitation-only, but requests can be submitted to Bonas Antwerp. Interested clients are requested to call the office at +32 (0) 3233 7080.
Based in Australia, Newfield has been developing the Tongo Diamond Project since 2018, when it acquired the site from Stellar Diamonds.
The project comprises two adjacent mining licenses covering a combined area of 134 square kilometers (about 52 square miles) in eastern Sierra Leone with five primary kimberlite pipes.
The first two pipes Newfield will mine have been dubbed Kundu and Lando.
Newfield said processing from the underground and surface at Kundu continues to yield “encouraging results,” with a high proportion of what’s recovered turning out to be gem-quality diamonds.
It is believed Tongo will produce 8.3 million carats of diamonds over the span of its life, including an indicated and inferred resource of 3.03 million carats at Lando and 2.76 million carats at Kundu.
Newfield employed 200 people at the mine as of March 31, including graduate trainees, contractors, and interns. Of the 200, 166 (83 percent) are local Sierra Leonians and 128 (64 percent) have permanent employment contracts, it said.
Twelve percent (about 20 people) of the local employees are women. Newfield said it intends to increase the number of women working at the mine, in line with its diversity policy.
In addition to Tongo in Sierra Leone, Newfield is conducting diamond exploration in neighboring Liberia via two licenses covering 670 square kilometers (about 259 square miles), known collectively as the Kumgbo Kimberlite Project.
More on Sourcing
The Latest
CollectionsOct 10, 2025
Count Down to the Holidays With Astrid & Miyu’s Advent CalendarsThe trio of Advent calendars include a version with 18-karat gold and lab-grown diamond jewelry in a red lacquer jewelry box.
CollectionsOct 10, 2025
Piece of the Week: Marla Aaron’s ‘Nymphenburg Lock’Created in collaboration with Nymphenburg Porcelain, the lock is part of a four-piece collection that took two years to bring to fruition.
MajorsOct 10, 2025
Frederick Goldman Names New VP of SalesJewelry industry veteran Alisa Bunger has taken on the role.
Brought to you by
JA New York Fall Is Right Around the CornerThe upcoming show provides savvy retailers with the opportunity to stock their cases with best sellers in advance of the holiday season.
AuctionsOct 09, 2025
This Fabergé Egg Could Crack $27M At Auction“The Winter Egg” set the world auction record for a Fabergé piece twice at previous Christie’s sales.
Weekly QuizOct 09, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
MajorsOct 09, 2025
Sy Kessler Buying Watch Batteries as Silver Hits Record High The company will pay 1.5x silver’s current spot price for each pound of silver oxide batteries submitted.
CollectionsOct 09, 2025
Katkim Launches First Men’s CollectionThe line includes a “Shadow” series crafted exclusively for the new men’s offering and reimagined styles from the brand’s core collections.
SourcingOct 08, 2025
In ‘Storied Diamond,’ Jared Jewelers Is Emphasizing the Journey The retailer’s new collection of engagement rings and fashion jewelry is set with natural diamonds that are traceable via blockchain.
CollectionsOct 08, 2025
Emily P. Wheeler Shifts Into Neutral for Latest ‘Ombré’ CollectionThe champagne colorway in her newest “Ombré” collection combines white and trendy brown diamonds, a departure from her usual vibrant hues.
CollectionsOct 08, 2025
Tsuba Designs Inspire Monica Rich Kosann’s New CharmsKosann partnered with the Museum of Fine Arts, Boston, to create a set of necklaces inspired by the artwork on samurai sword handguards.
CrimeOct 07, 2025
Men Who Posed as Utility Workers Found Guilty in Jeweler’s MurderCarlos Jose Hernandez and Joshua Zuazo face life in prison for the October 2024 murder of 72-year-old Detroit-area jeweler Hussein Murray.
CollectionsOct 07, 2025
Jessica McCormack Looks to Sea Spirits for ‘Tempest’ CollectionThe brand’s first high jewelry collection, “Tempest” plays with movement while calling to mind the folklore of the sea.
SourcingOct 07, 2025
Columbia Gem House Announces ‘Opals for Outback Heroes’ FundraiserProceeds from its jewelry raffle will go to a volunteer-run fire and rescue group in the Lightning Ridge area of New South Wales, Australia.
MajorsOct 07, 2025
Stuller Names Its S.E.R.V.E Stars for 2025Stuller said the recipients embody the company’s core values, which include community participation and personal and professional growth.
WatchesOct 06, 2025
This Fall, Citizen’s Forecast Calls for RainCitizen’s new “Rainell” women’s watch has a raindrop-shaped case and is available with a silver-, gold-, purple-, or green-colored dial.
AuctionsOct 06, 2025
The ‘Rolex That Made Rolex’ Heads to Auction at Sotheby’s The “Mercedes Gleitze Rolex Oyster,” named for the British endurance swimmer who made it famous, will go up for sale next month.
GradingOct 06, 2025
GIA India Names Former De Beers Exec as New Managing DirectorAmit Pratihari was previously the managing director of De Beers India and Forevermark India.
SourcingOct 06, 2025
SoCal 24 Karat Club Integrates Into Diamond Club West CoastMembers of the Jewelers 24 Karat Club of Southern California will gain access to expanded services, resources, and connections, DCWC said.
TrendsOct 03, 2025
Selena Gomez, Benny Blanco Tie the Knot Wearing Diamonds, White MetalsGomez’s jewelry included Tiffany & Co. drop-style earrings while Blanco stacked diamonds from Jacob & Co. on his wrist.
GradingOct 03, 2025
Grading Lab HRD Antwerp Names New CEODiamond industry banking veteran Paul De Wachter will take on the role in January 2026.
TrendsOct 03, 2025
Piece of the Week: Kallati’s Pink Sapphire RingTaylor Swift flaunts an Elizabeth Taylor-esque gemstone in promo for her new album, “The Life of a Showgirl.”
CollectionsOct 02, 2025
Boucheron Debuts Cuffs Crafted With 3D-Printed SandIts “Quantre Sand” capsule was made using a 3D sand printing technique borrowed from the automotive and aeronautics industries.
CrimeOct 02, 2025
$1M in Jewelry Stolen in Northern California Smash and Grab Four individuals have been charged in the “takeover-style” robbery of Heller Jewelers last month, and additional charges are expected.
MajorsOct 02, 2025
Neil Lane Jewelry Exhibition Coming to Toledo Museum of Art“Radiance and Reverie” will showcase more than 150 jewels from Lane’s personal collection by Tiffany & Co., Cartier, and more.
TrendsOct 02, 2025
Amanda’s Style File: October’s Colorful ShowThe month’s birthstones, tourmaline and opal, complement the palette of autumn.
ColumnistsOct 01, 2025
Peter Smith: Why Vendor Success Starts With Self-ReflectionSmith shares the importance of looking at your company with openness and honesty to identify opportunities you may be missing.
