Sourcing

Gemfields Opens $15M Automated Sort House in Mozambique

SourcingFeb 25, 2019

Gemfields Opens $15M Automated Sort House in Mozambique

The colored stone miner said the state-of-the-art facility will significantly raise production levels.

20190225_Gemfields-sorthouse.jpg
Gemfields said its new $15 million sort house in Mozambique features an automated process to allow for greater production levels.

London—Gemfields has opened a $15 million ruby sort house at its Montepuez ruby mine in Mozambique.

The colored stone miner said the state-of-the-art facility will significantly raise production levels, allowing it to “consistently deliver a greater volume and spectrum” of rubies.

It uses the natural properties of rubies as a means for automated sorting, Gemfields said.

The raw material is first washed and then passed under ultraviolet light. Since rubies naturally fluoresce under UV light, optical sorters can detect the fluorescence and then use blasts of air to direct individual rubies to separate channels for further sorting and grading.

Gemfields said using programmable logic controllers and data software under the UV light is faster, more reliable and more efficient than the human eye. It also allows for the identification of a finer material component than before.

The facility also accommodates more wash plants, now washing the equivalent of 10,000 tons of ore per day.

“Previously the sorting of rubies was largely manual, but it is very exciting to now introduce automated sorting, which will require minimal manual sorting,” said Kaung San, the company’s ruby grading supervisor. “Our productive capacity will increase exponentially.”

Gemfields said the automation of the sorting process won’t result in a reduction in its workforce.

In fact, increased productivity at the sort house means Gemfields will expand its current active mining area, requiring the company to hire more people.

The colored stone miner also said the manual aspect of the sorting process—the categorization and grading of the rubies—will require more highly skilled employees. Rather than look outside the country for this expertise, Montepuez is training a group of Mozambican gemologists who will specialize in the selection and classification of rubies.

Gemfields said its $15 million investment in the sort house is the largest of its kind in the Cabo Delgado province of Mozambique.

Looking ahead, the colored stone miner said the new sort house will be complemented by the addition of a new thickener to the wash plant this year, increasing capacity from 125 tons per hour to 150 tons per hour.

Two high-capacity pre-screen plants also will be added to remove the finer particle material prior to being fed to the wash plant, resulting in a greater concentration of material of the desired size.

Brecken Branstratoris the senior editor, gemstones at National Jeweler, covering sourcing, pricing and other developments in the colored stone sector.

The Latest

Sylvie Jewelry Auranova Collection Campaign Imagery
CollectionsApr 25, 2025
Sylvie Looks to Water in New Sculptural Bridal Collection

“Shell Auranova” is the next generation of the brand’s bridal line, featuring half-bezel engagement rings with bold and fluid designs.

Pomellato Nudo toi et moi ring
FinancialsApr 25, 2025
Kering’s Jewelry Brands Persevere as Q1 Sales Sink 14%

Boucheron and Pomellato performed well in an otherwise bleak quarter for Kering amid struggles at Gucci.

Deborah Meyers Experience The Birds Earrings
EditorsApr 25, 2025
Piece of the Week: Deborah Meyers Experience’s ‘The Birds’ Earrings

Designer Deborah Meyers created her birds from oxidized sterling silver, rose-cut diamond eyes, and Akoya Keshi pearl feathers.

ejap cohort 1872x1052.png
Brought to you by
Emerging Jewelers Accelerator Program Announces Second Cohort of Aspiring Jewelry Entrepreneurs

Six new retail businesses were selected for the 2025 program, which began in January.

LIM-401 2024 National Jeweler Supplier Bulletin- iD100 Web and Eblast FINAL (1).jpg
Supplier BulletinApr 24, 2025
Protect Your Customers and Your Business

Sponsored by the Gemological Institute of America

Weekly QuizApr 24, 2025
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Wolf CEO Simon Wolf
EditorsApr 24, 2025
Q&A: Wolf’s CEO Talks U.S. Expansion

Simon Wolf shares why the time was right to open a new office here, what he looks for in a retail partner, and why he loves U.S. consumers.

Iowa jeweler Herman Ginsberg
IndependentsApr 24, 2025
Longtime Iowa Jeweler Herman Ginsberg Dies at 99

A third-generation jeweler, Ginsberg worked at his family’s store, Ginsberg Jewelers, from 1948 until his retirement in 2019.

gia1d100 btyb.jpg
Brought to you by
Protect Your Customers and Your Business

The risk of laboratory-grown diamonds being falsely presented as natural diamonds presents a very significant danger to consumer trust.

Charles & Colvard moissanite ring
FinancialsApr 24, 2025
Charles & Colvard Delisted From Nasdaq Due to Noncompliance

The company failed to file its quarterly reports in a timely manner.

Mined + Found "Hope" Matchbox Locket
TrendsApr 24, 2025
Amanda’s Style File: So Charming

Charms may be tiny but with their small size comes endless layering possibilities, from bracelets to necklaces and earrings.

Bulgari’s expanded factory in Valenza, Italy
MajorsApr 23, 2025
Bulgari Doubles Size of Jewelry Factory in Italy

Located in Valenza, the now 355,000-square-foot facility includes a new jewelry school that’s open to the public, Scuola Bulgari.

Jason McNary accepting FGI Fine Jewelry Rising Star award for Paola Sasplugas
Events & AwardsApr 23, 2025
PDPaola Creative Director Wins FGI’s ‘Rising Star’ Award

Paola Sasplugas, co-founder of the Barcelona-based jewelry brand, received the Fine Jewelry Award.

1999 Cosmograph Daytona, Ref.16516
AuctionsApr 23, 2025
Rare Custom Rolex Daytona Heads to Auction

A platinum Zenith-powered Daytona commissioned in the late ‘90s will headline Sotheby’s Important Watches sale in Geneva next month.

Carmelo Anthony and Jaylen Brown David Yurman campaign
MajorsApr 23, 2025
David Yurman’s New Campaign Stars Carmelo Anthony, Jaylen Brown

The basketball stars wear men’s jewelry from the “Curb Chain” collection.

Woman wearing Zales jewelry
MajorsApr 22, 2025
Zales’ Rebrand Takes Playful Approach to Fine Jewelry

The Signet Jewelers-owned retailer wants to encourage younger shoppers to wear fine jewelry every day, not just on special occasions.

JAR Apricot Blossom bracelet
AuctionsApr 22, 2025
Christie’s to Auction JAR Jewelry Collection

The 21 pieces, all from a private collector, will be offered at its Magnificent Jewels auction next month.

National Jeweler columnist Lilian Raji
ColumnistsApr 22, 2025
The PR Adviser: Building Buzz Through Word of Mouth

Lilian Raji answers a question from a reader who is looking to grow her jewelry business but has a limited marketing budget.

Avi Levy
GradingApr 22, 2025
Avi Levy Is GCAL By Sarine’s New Chief Growth Officer

GCAL by Sarine created the new role to sharpen the company’s focus on strategic partnerships and scalable expansion.

Scottsdale Fine Jewelers store exterior
IndependentsApr 22, 2025
Brinker’s Jewelers Acquires Fellow Independent

The Indiana jeweler has acquired Scottsdale Fine Jewelers in Scottsdale, Arizona.

Cartier Exhibition Installation at Victoria & Albert Museum
Events & AwardsApr 21, 2025
An Exhibition Exploring the History of Cartier Is Now on Display

“Cartier: Design, Craft, and Legacy” opened earlier this month at the Victoria and Albert Museum in London.

Bill and Birdie Levine of Van Cott Jewelers
IndependentsApr 21, 2025
New York Jeweler to Close After 111 Years

Van Cott Jewelers in Vestal, New York, is hosting a going-out-of-business sale.

IJO Director Samantha Larson
IndependentsApr 21, 2025
IJO Names New Director of Vendor Relations, Merchandise Strategy

Industry veteran Samantha Larson has held leadership roles at Borsheims, McTeigue & McClelland, Stuller, and Long’s Jewelers.

Events & AwardsApr 21, 2025
Jewelers of Louisiana, Mississippi Jewelers Association to Co-Host Convention

The two organizations will hold the educational event together this fall in Mississippi.

Daymond John
Events & AwardsApr 18, 2025
Daymond John to Give Keynote at JCK Las Vegas

The entrepreneur and “Shark Tank” star will share his top tips for success.

Dukachi Easter Bread Pendant
CollectionsApr 18, 2025
Piece of the Week: Dukachi’s ‘Easter Bread’ Pendant

The Ukrainian brand’s new pendant is modeled after a traditional paska, a pastry often baked for Easter in Eastern European cultures.

Bremer Jewelry
IndependentsApr 18, 2025
Bremer Jewelry to Reveal Renovated Store

The jeweler has announced a grand reopening for its recently remodeled location in Peoria, Illinois.

Tiffany & Co. Strong Like Mom campaign
MajorsApr 18, 2025
Tiffany & Co. Employees Star in Mother’s Day Campaign

The “Strong Like Mom” campaign features moms who work at Tiffany & Co. and their children.

×

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