Editors

Sustainability Stories: Mine to Market with Moyo Gemstones

EditorsApr 29, 2019

Sustainability Stories: Mine to Market with Moyo Gemstones

The first in a new series from Senior Editor Brecken Branstrator highlights a program bringing tracked gems from women miners in Tanzania to market and improving mining along the way.

20190429_Moyo-5.jpg
A new pilot program launched by Pact, a non-governmental organization, and gemstone trading partners brings tracked and traced gems from women miners in Tanzania to market.
The challenges associated with creating a supply chain that’s transparent, traceable and ethical are myriad.

Responsible sourcing, its obstacles and how to tackle them are among the industry’s hottest topics today, especially in the colored gemstone sector.

While discussion on these topics is necessary, it can be easy to get caught up in conversations about what still needs to happen without stopping to appreciate the concrete work being done by individuals and industry bodies today.

To that end, I’ve decided to launch a blog series highlighting real projects and initiatives undertaken by companies big and small, not only to celebrate them but to show what’s possible.

I’m kicking it off with a look at a recently launched program called Moyo Gemstones—so named because it means positive things in several different African languages—designed to help gemstones extracted by female miners in Tanga, Tanzania, move from mine to market while improving the lives of the women along the way.

The pilot project is a collaboration between the non-governmental organization Pact, Monica Stephenson’s Anza Gems and Nineteen48, with input from the Tanzania Women Miners Association (TAWOMA) and a blockchain addition from Everledger.

Building a Foundation
Moyo Gemstones builds on work already done in the area. The Gemological Institute of America approached Pact in 2016 to partner on an education program for miners, and the pilot took place in the Tanga province. 

Cristina Villegas, director of Mines to Markets at Pact, told me in a recent interview that while the program was successful in helping these women drastically increase sales, Pact realized they were still selling on a subsistence basis and that more needed to be done to help them find equal footing in today’s gem market. 

Collaborating with the miners and other players, Pact designed the mine-to-market program now called Moyo Gemstones, empowering the women to work safer, mine better, improve financial security and create equitable markets for their gems.

A couple of the miners in Tanzania with Anza Gems’ Monica Stephenson
A couple of the miners in Tanzania with Anza Gems’ Monica Stephenson

Not only do they want to effect change in the gemstone supply chain and the way gems benefit the communities from which they come, but also offer storytelling around them. 

“Consumers, regardless of commodity, are looking for different ways to interact and to make an impact through their purchasing power,” said Rebecca Villalobos, a member of Pact’s Innovation team. 

Based on direct feedback from the miners, Moyo Gemstones decided to hold “market days” in which all the women travel to a central location to sell their goods, providing a regular, controlled system for Moyo miners to do business with vetted local brokers and traders.

Each woman who wants to participate must be verified as a legal miner, among other considerations.

Moyo Gemstones will use the pilot phase to figure out how often the market days should happen. The first one is scheduled for May.

(A side note: The Tanzanian government has yet to officially lift the ban on rough gemstone exports instituted last year but has started to implement a few changes. Regardless, Villegas said the government has been supportive of the program and, because of Pact’s long history in the country, allows Pact to export despite the ban.)

Building the Communities
The Moyo Gemstones initiative is intriguing not only because it’s helping bring gems from vetted local miners to market, but also because it’s working to improve mining directly.

They are partnering with Tanzanian engineering services firm MTL Consulting to improve health and safety, working conditions, and basic geological and engineering support for enrolled miners. The firm has experience working with the Fairtrade Foundation’s ASM gold miners in East Africa.

Pact is also working with the Alliance for Responsible Mining to adapt the Code of Risk-Mitigation for ASM engaging in Formal Trade (CRAFT)—a global “entry” standard for due diligence in artisanal and small-scale mining—to colored gemstones.

“If we want to include as many (miners) as we can and change their lives, we have to meet them where they are but also set expectations and incentives,” Villegas said.

They will work with MTL Consulting to get the Moyo miners to CRAFT level over time.

In the meantime, as CRAFT for Gemstones develops, they will track progress against local laws, to which CRAFT is closely aligned, and aim to reinvest back into the community through staffed health clinics and teacher housing, which the women miners indicated are top priorities.

Adding Traceability
There’s another interesting aspect to the project.

Pact has been working with Everledger, the same tech company that developed Gubelin’s Provenance Proof blockchain, to develop a blockchain suitable for these artisanal miners.

Stones will first be recorded on the blockchain at market days. (There’s information on the reasoning behind that on the Moyo Gemstones website.)

When asked if this project presented any unique challenges, given the ASM aspect, compared with others they had worked on in colored stones, Carrie George, Everledger’s vice president, head of sustainability solutions, said when the company developed Provenance Proof with Gübelin, they already had taken ASM miners into account.

“One key factor that we needed to ensure was the ease of use and simplification of the process.”

Pact, Anza Gems and Nineteen48 worked directly with the women miners to put together a program that is feasible.
Pact, Anza Gems and Nineteen48 worked directly with the women miners to put together a program that is feasible.

She said teaming with the right partner, Pact, has been crucial in this project since they have so much experience on the ground with ASM miners. She added that education and training are important, which Pact has enabled through on-the-ground support and training.

“Everledger has evaluated the most effective and low-cost solutions for miners to provide chain-of-custody information. This combination is essential for downstream retailers to be able to confidently source ASM gems and, therefore, support their livelihoods.”

Pact and Everledger also had to keep the miners’ security in mind, meaning they had to balance providing enough information to allow for transparency and rich storytelling with privacy considerations.

“Part of the challenge here is recognizing that women miners are some of the most vulnerable people in the world,” Villegas said. “There’s usually some kind of shock event that happens to push them into mining. Not always, but often.”

Information visible on the blockchain will show the physical movement of the gemstones as well as who has handled them. There will also be basic information on the traders, exporters, brokers, mining regions and TAWOMA.

Individual miners’ stories and the program’s tracked metrics will not be on the blockchain, however, for both privacy and safety reasons.

Rather, Pact will aggregate the data and share information on MoyoGems.com to allow consumers, designers and retailers to learn more about how the miners are doing and how the program is developing.

Pact will test a few stones on the blockchain at the first market day in May and then improve as they confirm the format and get used to the technology, Villegas said, slowly incorporating blockchain as a complement to the chain of custody being constructed.

Headed to Market
To provide a point of sale for the loose stones the women mine—ruby, sapphire, tourmaline and garnet—Pact partnered with gem trading companies Anza Gems and Nineteen48. The two will work with existing traders in the country to buy gems from the participating miners and make them available to the global market.

“From the moment I heard about the GIA/Pact initiative, I could see the potential for a sustainable economic model,” Stephenson, of Anza Gems, said. “This could be a way out of poverty for these women and their children, through a natural resource they can harness. We can help bridge the gap of knowledge to help them mine better, safer and more productively, and give them a fair market value for their gems. And we can help them tell their stories and bring their beautiful gems to light.”

The first market day to connect the women miners of Tanga, Tanzania, with local traders is scheduled to take place in May.
The first market day to connect the women miners of Tanga, Tanzania, with local traders is scheduled to take place in May.

She added that as they worked on the program, local brokers and traders, as well as others in the Tanga community, rallied around it.

“When you elevate women, you are helping the entire community and region.”

Stephenson said faceted gems should be available by early to mid-summer for designers or retailers interested in buying and setting them in jewelry.

Ultimately, Pact is hoping that in building a program in direct collaboration with the miners and using participants and industry members already in place, rather than reinventing the wheel, Moyo will become a scalable project that could be replicated at other artisanal mining sites.

For now, I’m excited to see how this pilot program progresses.

To read more about it or learn how to purchase the miners’ gems, visit MoyoGems.com.
Brecken Branstratoris the senior editor, gemstones at National Jeweler, covering sourcing, pricing and other developments in the colored stone sector.

The Latest

Dunkelberger’s Fine Jewelry
IndependentsJun 05, 2026
Pennsylvania Jewelry Store To Close After 79 Years

Jim Springer, owner of Dunkelberger’s Fine Jewelry, is heading into retirement.

Stock image of a person shopping at the grocery store
SurveysJun 05, 2026
Consumers to Cut Back on Spending Amid Rising Prices, Survey Shows

When conducting its May consumer confidence survey, The Conference Board asked extra questions about consumers’ budgeting strategies.

Rebel Jewelry Tunnel Charm
CollectionsJun 05, 2026
Rebel Jewelry’s Charm Symbolizes Perseverance for Pride Month

The “Tunnel” charm, our Piece of the Week, celebrates Pride Month with its design inspired by hope and the light at the end of the tunnel.

PG-05-SHOT-2-LUCIDA.033 1.png
Brought to you by
All Eyes on Gold Prices. Alternatives to Look For. And What to BEWARE of in Vegas

As gold prices rise, today’s retailers are looking for alternatives at prices that will appeal to wider audiences.

Three gold rings set with yellow- and brown-hued diamonds
SourcingJun 05, 2026
State of Diamonds: The Way Forward for Natural Diamonds

The jewelry industry is reassessing its positioning as Gen Z reshapes the retail landscape and lab grown continues to gain market share.

Weekly QuizJun 05, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
A Marvelous Journey: The Collection of Maurice Tempelsman
AuctionsJun 04, 2026
Treasures from Maurice Tempelsman’s ‘Marvelous’ Life Head to Auction

Up for auction at Sotheby’s, the collection of Tempelsman’s personal effects includes a Cartier Tank watch Jackie O. gifted him.

Dakota Badia and Nancy Badia
CollectionsJun 04, 2026
Buddha Mama to Spend the Summer in Aspen

The Miami-based fine jewelry brand will host its first summer residency in the Colorado mountain town from June 5 to Aug. 23.

1872x1052-NextGem-2026-National-Jeweler-Advertorial.jpg
Brought to you by
How Modern Training Is Becoming a Competitive Advantage for Jewelry Retailers

With the trade and customer trust in mind, GIA® developed NextGem™ – on-demand training designed specifically for retail.

AGS at Peter Yantzer Building dedication
MajorsJun 04, 2026
AGS Honors Late Peter Yantzer, Holds Time Capsule Ceremony

The organization also announced its international board of directors for the 2026-2027 term.

Neiman Marcus downtown Dallas store
MajorsJun 04, 2026
Neiman Marcus’ Downtown Dallas Store to Close in September

Saks Global confirmed the closure this week, spelling the end for a store that’s been part of downtown Dallas for more than 100 years.

The Retail Smiths founder and National Jeweler columnist Peter Smith
ColumnistsJun 03, 2026
Peter Smith: When Top Talent Leaves and What It Says About You

Smith discusses how managers should handle a top performer's exit, warning that a poor response could have a lasting impact.

Screenshot of the Tracr website homepage
GradingJun 03, 2026
GIA’s Tracr Investment Is First Step Toward Industry-Owned Platform

The Gemological Institute of America is now a 30 percent stakeholder in Tracr, the De Beers-backed blockchain for diamonds.

The 1916 Company Coast to Coast Roadshow
WatchesJun 03, 2026
The 1916 Company Taking Pre-Owned Rolexes on the Road, Again

The retailer is bringing Rolex Certified Pre-Owned watches to five U.S. cities in 2026 for collectors to see, try on, and purchase.

Jessica Alba in Gabriel & Co. campaign
IndependentsJun 03, 2026
Jessica Alba Is the New Face of Gabriel & Co.

The actress and entrepreneur stars in the jeweler’s new campaign that celebrates life’s quiet moments.

Anna Maccieri Rossi Ora Wood Sunrise Cuff, Marie Lichtenberg High Jewelry Bandana, Anna Maccieri Rossi Carpe Diem Pendant
TrendsJun 03, 2026
State of Design: Only the Innovative Will Survive

The price of gold has risen, affecting the number of pieces designers make, the materials they use, and how they position themselves.

Woman with crossed hands and rings on fingers
FinancialsJun 02, 2026
Signet Jewelers’ Q1 Sales Up 2% As It Focuses on ‘Core Four’

The jewelry retailer is zeroing in on Zales, Jared, Kay Jewelers, and Blue Nile as it looks to create unique brand identities for each.

Dr. Akinwumi Adesina, chairperson of the Diamonds for Development Fund
SourcingJun 02, 2026
Leader Appointed for Botswana’s Diamonds for Development Fund

Dr. Akinwumi Adesina, a development economist, will head the fund created to help Botswana diversify its economy.

James Marks
WatchesJun 02, 2026
Watch Industry Veteran James Marks Joins Sotheby’s

Sotheby’s has appointed the former Phillips executive as its global head of private sales and retail in its watches division.

Sothebys 10-carat blue diamond, 120 carat Harry Winston diamond necklace
AuctionsJun 02, 2026
Sotheby’s to Auction 10-Carat Blue Diamond, 1960s Harry Winston Necklace

A private collection of five Paraíba tourmalines also will be up for sale at Sotheby’s High Jewelry auction in New York, scheduled for June 16.

People shopping in a jewelry store
IndependentsJun 02, 2026
State of Retail: 6 Things Retailers Should Know About Consumers Today

From Gen Z’s view of luxury to “doom spending,” these are the six consumer trends to note this year.

Zahn-Z Big Zaha Art Deco Ring
Events & AwardsJun 01, 2026
Design Atelier Brands Have a Big Night at Emotional Couture Design Awards

The show started by honoring Mildred Marcano, ended with a tearful Beth Anne Bonanno, and recognized a dozen-plus designers in between.

Rapaport's rebranding
SourcingJun 01, 2026
RapNet Rebranding as Rapaport Trade

The revamped online diamond marketplace will feature pricing intelligence and data-driven tools for more efficient buying and selling.

Gemfields emeralds
SourcingJun 01, 2026
Gemfields’ Higher-Quality Emerald Auction Achieves $26.8M

The miner said demand for higher-quality emeralds is stable, but there is notable caution in the market.

Cultus Artem River of Heaven Necklace
CollectionsMay 29, 2026
Cultus Artem’s Necklace Is the Oasis in Las Vegas’ Desert

The “River of Heaven” necklace, our Piece of the Week debuting at Couture, combines 26 salt and pepper diamonds spaced by Tahitian pearls.

Sean Dunn, Amy Greenberg, Elise Greenberg, Coleman Clark, Mitchell Clark
IndependentsMay 29, 2026
Meet the 2026 Retailer Hall of Fame Inductees

This year’s inductees include second-, third-, and fourth-generation jewelers.

Jesse Itzler
Events & AwardsMay 28, 2026
JCK Announces Jesse Itzler as 2026 Keynote Speaker

The author, speaker, and entrepreneur will give his presentation, “Spiritual Billionaire,” on Saturday morning.

JCK Rocks Nelly Graphic
Events & AwardsMay 28, 2026
JCK Rocks To Ride With Nelly

Three-time Grammy award-winning artist Nelly is set to perform at the annual event at Tao Beach on Sunday night.

×

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