Sourcing

Rio Tinto Begins New Phase of Production That Will Extend Diavik’s Life

SourcingOct 08, 2024

Rio Tinto Begins New Phase of Production That Will Extend Diavik’s Life

Commercial production has begun underground at the Canadian diamond mine’s A21 pipe.

Rough diamonds mined at the Diavik Diamond Mine
A sampling of rough diamonds from the Diavik Diamond Mine, which is located in Canada’s Northwest Territories and owned by Rio Tinto. Rio Tinto just announced that commercial production has begun underground at the mine’s A21 pipe.
Yellowknife, Canada—The first phase of commercial production has begun at Diavik’s A21 underground mine, Rio Tinto announced late last week.

The A21 pipe opened in 2018. It was the last pipe commissioned at the Diavik Diamond Mine and has operated as an open-pit mine, until now.

The transition to underground production will be rolled out in two phases.

Rio Tinto approved the first phase in February 2023, investing $40 million in the project.

It authorized the second phase earlier this year, sinking an additional $17 million into underground operations at A21.

Rio Tinto said the construction of the A21 underground mine involved the development of more than 1,800 meters (a little over a mile) of underground tunnels to access the orebody.

It noted there were no lost-time injuries during the 20 months it took to construct the tunnels.

Diavik Chief Operating Officer Matt Breen said, “The A21 underground operation is positive news for our employees, partners, suppliers, and local communities in the Northwest Territories, as it will enable operations to continue through to closure. 

“Rio Tinto’s decision to proceed with phase two is a testament to the excellent performance of our Diavik team in successfully developing the underground mine beneath the previously mined A21 open pit.”

 Related stories will be right here … 

Located in Canada’s Northwest Territories, less than 150 miles south of the Arctic Circle, the Diavik Diamond Mine opened in 2003 and has produced more than 144 million carats of diamonds in the 21 years since.

It is one of three remaining active diamond mines in Canada, alongside Ekati (owned by Burgundy Diamond Mines) and Gahcho Kué (owned by De Beers Group).

Diavik consists of four kimberlite pipes: the aforementioned A21, plus A154 North, A154 South, and A418.

The original life-of-mine plan for Diavik forecast that it would close in 2025, but the two phases of underground mining at A21 are expected to extend the mine’s life into the first quarter of 2026.

Meanwhile, Rio Tinto said it’s begun investing in Diavik’s closure and remediation of the land, focusing on site clean-up, equipment procurement, and other closure readiness efforts.

Earlier this year, the company announced it had completed construction on a solar power plant at Diavik that will provide as much as 25 percent of the power the mine will need for closure work.

The plant’s solar panels are bi-facial, meaning they generate energy from both direct sunlight and light reflecting off snow, which covers the ground in that area most of the year. 

The Latest

Shipping containers on a ship
Policies & IssuesAug 06, 2025
Tariff on India to Rise to 50%, Trump Says

An additional 25 percent tariff has been added to the previously announced 25 percent.

Claire’s storefront
MajorsAug 06, 2025
Claire’s Files for Chapter 11 Bankruptcy Again

The jewelry and accessories retailer said its stores will remain open during the proceedings.

Smith & Son Jewelers storefront Springfield Massachusetts
IndependentsAug 06, 2025
Smith & Son Jewelers to Close 107-Year-Old Location

Its Springfield, Massachusetts, store is set to close as owner Andrew Smith heads into retirement.

rio-article photo-diamond.jpg
Brought to you by
Taking the Moment Head On: How Rio Grande Champions the Present & Future of Fine Jewelry

As a leading global jewelry supplier, Rio Grande is rapidly expanding and developing new solutions to meet the needs of jewelers worldwide.

Zahn-Z Beluga Spout Grey Spinel Ring and Beluga Spout Mandarin Garnet Ring
CollectionsAug 06, 2025
Zahn-Z Swims With Whales in ‘Beluga’ Collection

Designer Hiba Husayni looked to the whale’s melon shaped-head, blowhole, and fluke for her new chunky gold offerings.

Weekly QuizJul 31, 2025
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Paola De Luca presenting Trendbook 2026+ at Vicenzaoro
TrendsAug 06, 2025
Paola De Luca to Release Trendbook 2027+

She will present the 23rd edition of the trend forecasting book at Vicenzaoro on Sept. 7.

Omar Roy mugshot
CrimeAug 05, 2025
Report: Suspect Arrested in 1992 Murder of Miami Jeweler

Omar Roy, 72, was arrested in connection with the murder of jeweler Dionisio Carlos Valladares.

an instructor and a student in a bench jewelry classroom
Brought to you by
Investing in the Next Generation of Bench Jewelers

The Seymour & Evelyn Holtzman Bench Scholarship from Jewelers of America returns for a second year.

Mignon Faget Beyond Katrina Pendant and Beyond Katrina Pin
CollectionsAug 05, 2025
Mignon Faget Commemorates 20th Anniversary of Hurricane Katrina

The New Orleans-based brand’s “Beyond Katrina” jewels honor the communities affected by the storm.

National Jeweler columnist Lilian Raji
ColumnistsAug 05, 2025
The PR Adviser: Affiliate Marketing Is the Cost of Coverage

Lilian Raji explains why joining an affiliate network is essential for brands seeking placements in U.S. consumer publications.

Jewelers of America Logo
Events & AwardsAug 05, 2025
JA Announces Seymour & Evelyn Holtzman Bench Scholarship Winners

The organization has awarded a total of $42,000 through its scholarship programs this year.

2026 Gem Awards logo
Events & AwardsAug 04, 2025
Gem Awards, David Yurman Introduce $50K Grant for Emerging Designers

The winner of the inaugural David Yurman Gem Awards Grant will be announced live at the 2026 Gem Awards gala.

Marlo Laz peridot and diamond Alexandra earrings
TrendsAug 04, 2025
Amanda’s Style File: August’s Bright Baubles

As summer winds down, celebrate the sunny disposition of the month’s birthstones: peridot and spinel.

Surveillance image of Watch King robbery suspect
CrimeAug 04, 2025
‘The Watch King’ Assaulted, Robbed in Queens

Moshe Haimoff, a social media personality and 47th Street retailer, was robbed of $559,000 worth of jewelry by men in construction outfits.

Xavier Dibbrell
MajorsAug 04, 2025
Borsheims Welcomes New Assistant Facilities Manager

Xavier Dibbrell brings more than a decade of experience to the role.

Signet Jewelers logo
MajorsAug 01, 2025
Helzberg President Julie Yoakum Moves Over to Signet Jewelers

The addition of Yoakum, who will lead Kay and Peoples, was one of three executive appointments Signet announced Thursday.

Mike Alexander
MajorsAug 01, 2025
Jewelers Mutual Names Mike Alexander as President

The insurance company’s previous president and CEO, Scott Murphy, has split his role and will continue as CEO.

Hernsdorf Tears of Aphrodite Necklace
CollectionsAug 01, 2025
Piece of the Week: Hernsdorf’s ‘Tears of Aphrodite’ Necklace

The necklace uses spinel drops to immortalize the moment Aphrodite’s tears mixed with her lover Adonis’ blood after he was fatally wounded.

Lindsey Scoggins Studio convertible flower earrings
Events & AwardsJul 31, 2025
These Are the 2025 CASE Award Winners

Jewelers of America’s 35th annual design contest recognized creativity, artistry, style, and excellence.

Matthew Tratner, new president of Continental Buying Group
IndependentsJul 31, 2025
Matthew Tratner Takes Over as CBG President

Tratner succeeds Andie Weinman, who will begin stepping back from the buying group’s day-to-day operations.

Stock image of rough diamonds from the Kimberley mine
Policies & IssuesJul 30, 2025
Tariff on India Will Be 25%, Trump Says

The president made the announcement via Truth Social Wednesday, adding that India also will face a penalty for its dealings with Russia.

Pomellato Mini London blue topaz and diamond bracelet
FinancialsJul 30, 2025
Kering's Jewelry Brands Resilient As H1 Sales Slide 16%

The luxury titan’s star brand Gucci continued to struggle amid a "tough" environment.

Zadok Rolex Austin
WatchesJul 30, 2025
Peek Inside Zadok Jewelers’ New Rolex Showroom in Austin

Its opening marks the completion of the retailer’s new 11,000-square-foot store in the Texas capital.

Crowd of people in a shopping mall
SurveysJul 30, 2025
Consumer Confidence Ticks Up in July

Respondents shared concerns about tariffs and commentary on the “Big Beautiful Bill.”

Making a Killing in Diamonds by Rob Bates
SourcingJul 30, 2025
Rob Bates to Release Latest Book in His ‘Diamond District Mystery’ Series

“Making a Killing in Diamonds” tells the story of Mimi Rosen, the disappearance of a scientist, and the murder of lab-grown diamond CEO.

Tacori bezel-set diamond bands
EditorsJul 29, 2025
Out & About: Visiting Tacori’s Design Studio in LA

Senior Editor Lenore Fedow learned a lot when she took a behind-the-scenes factory tour with the jewelry brand earlier this year.

Mighty Fierce Audacious Necklace, Sandy Rubin Aziza Necklace, Koulianos Designs Illuminations Shield Pendant
Events & AwardsJul 29, 2025
Melee The Show Welcomes 15 New Designers

The first-time exhibitors, set to debut at the New York City show, share a devotion to craftsmanship, storytelling, and material integrity.

×

This site uses cookies to give you the best online experience. By continuing to use & browse this site, we assume you agree to our Privacy Policy