Our Partners


Meet the team

Becoming Moyo Gemstones

At the heart of the program is the Tanzania Women Miners Association (TAWOMA). Supporting them is Pact, ANZA Gems, Nineteen48, and you, international consumers seeking to change the world with us.  

Special thanks 

A special thanks to GIA's Jim Shigley, Robert Weldon, Kim Cino, Dona Dirlam, Judi Shechter, and Pedro Padua for their work on the pilot gemology program. Further thanks to Marvin Wambua, GIA consultant, for his immense knowledge and energy. Thank you to Brad Brooks Rubin for his encouragement that GIA work with Pact. 

Individuals within Moyo Gemstones 


President Eunice Negele and Secretary General Salma Kundi are the amazing leaders of TAWOMA, a volunteer-run organization with 3,000 members across Tanzania. 


Mr. Norbert Massay of Pact Tanzania is our man in the field working with TAWOMA leadership. Pact's Rebecca Villalobos, Katie Fackler, Brian Vo, and Cristina M. Villegas support from Pact Global's Washington, DC headquarters. 

ANZA Gems 

Monica Stephenson and Meghan Deese form ANZA Gems, a Seattle-based ethical gem trading company with an emphasis on East Africa. 


Stuart Pool and Gary Seneviratne form Nineteen48, a UK-based ethical trader sourcing from Tanzania and Sri Lanka. 


Carrie George leads this effort on behalf of Everledger, an emerging technology company enterprise aiming to deliver positive social, economic and environmental impacts worldwide. Their technology backs the Provenance Proof Platform, a blockchain traceability solution developed with the support of the Gübelin Gem Lab to improve transparency for the gem trade. Everledger’s innovative solutions drive transparency along global supply chains through digital provenance tracking. Its blockchain-enabled platform underpins the Provenance Proof Blockchain, a joint-partnership with Gübelin Gem Lab as the first global colored gemstone blockchain that enables next-level transparency for the gem trade.

In memoriam 

Edward Mendelson was an early part of the team, participating in the co-design workshop in Tanga in June 2018. He passed away unexpectedly in December 2018 in London. We miss him dearly. 

Salma Kundi and Eunice Negele (TAWOMA), with program manager Rebecca Villalobos (Pact). March 2019

Salma Kundi and Eunice Negele (TAWOMA), with program manager Rebecca Villalobos (Pact). March 2019

Industry partners (full bios)

Stuart Pool, Nineteen48


  Stuart is a specialist in responsibly mined and fully traceable coloured gemstones, mainly sourced directly from mines in Sri Lanka and Tanzania. He runs gem trading companies Nineteen48 (www.nineteen48.com) and is a co-founder of Fair Luxury (www.fairlux.co.uk), a group focused on positive change in the jewellery industry. Stuart works closely with local mine owners to provide a mine-to-market service, from extracting the rough gem material and the cutting and polishing of gemstones, right up to the sale of gems to the end customer, both wholesale and retail. The emphasis throughout the supply chain is on maximum transparency and fair benefits to everyone involved. More at www.nineteen48.com

Monica Stephenson, ANZA


 Monica Stephenson, a writer, jewelry expert, and entrepreneur with over 20 years experience in the jewelry industry, chronicles stories of artisan jewelry designers on the award-winning jewelry blog, idazzle.com. In 2015 she launched ANZA Gems, which fuels development in Kenya and Tanzania through fair trade gem purchasing and supporting education in gemstone communities. She is on the national board of the Women’s Jewelry Association and Ethical Metalsmiths, and is a frequent speaker about social media and responsible sourcing. Follow her global adventures as an “accidental gem dealer” on social media at @idazzle, @anzagems, and www.anzagems.com 

Carrie George, Everledger


Carrie George is Vice President of Sustainability at technology company Everledger, which is providing the blockchain-enabled traceability components for Moyo Gems. Carrie brings expertise from the jewelry, electronics, and the apparel industries, working to better map supply chains and mitigate social and environmental issues identified. Before Everledger, she was the Director of Responsible Sourcing for Brilliant Earth, Head of Apple’s Responsible Sourcing programs, and has worked with communities globally involved in mining and manufacturing.


Tanzania partners (full bios)


Salma Kundi

Ms. Kundi is a green tourmaline miner and Secretary General of the Tanzania Women Miners Association (TAWOMA). She has been involved improving conditions and opportunities for women miners for nine years.  


Eunice Negele

Ms. Negele is a small-scale miner and is President of the Tanzania Women Miners Association. She has been active in mining and with TAWOMA since the year 2000. She mines feldspar, gold, and amethyst. 


Norbert Massay

 Norbert Massay is our man in the field and longtime program manager at Pact Tanzania. He serves as the GIA Partnership Manager for Tanzania whilst also leading UNICEF partnership activities. Before joining Pact in 2012, Massay worked for a Pact-Tanzania partner organization for four years focused on health projects. Massay has BS in Environmental Management and MA in Community Development from Sokoine University of Agriculture, an MBA from the University of Dar es Salaam, and has taken coursework from Edumine. He speaks fluent English and Kiswahili.

Pact team (full bios)

Cristina M. Villegas


Cristina is the director of the Mines to Markets (M2M) program at Pact. She is a recognized global expert in ASM, has 15 years of experience in the international development sector, and is a popular speaker on responsible mining and jewelry themes. She is an advisory council member of the Gemstone Knowledge Hub and Ethical Metalsmiths, among others. She is a graduate of the UC San Diego, the London School of Economics, and lectures at the Columbia University’s massive open online course (MOOC) focused on extractives.  Originally from Northern California, she has lived and worked for extended periods in London, UK, Kampala, Uganda, and Washington, DC.  She is on Instagram at cristina.rocks and pact.rocks 

Rebecca Villalobos


Rebecca is the gemstone program manager for Pact and serves on Pact’s Innovation Team. For almost 10 years, she has worked at the intersection of international social impact, entrepreneurship, and innovation. Prior to coming to Washington, she ran a social incubator and fellowship program (aptly named  “The Mine”), working alongside leading foundations, entrepreneurs, and non-profits to launch sustainable solutions to social problems. A passionate social entrepreneur,  she has consulted for several social enterprises throughout Southeast Asia on creating social impact through ethical sourcing and responsible supply chains, most recently working in Cambodia. Rebecca holds an MA in social enterprise from American University, where she focused on sustainability and women’s economic empowerment. 

Katie Fackler


Katie is program manager with Pact Ventures, the impact investing unit within Pact. Katie focuses on Moyo's financial modelling and has been a key member of the program startup team. Katie began her career as a Princeton in Africa Fellow with the UN World Food Programme (WFP) in Benin, then moved to positions with the WFP in Côte d’Ivoire and Mauritania. She then worked in Cote d’Ivoire with the European Union, then as an Investment Banking Associate in Morgan Stanley, and then onto Pact Ventures. She has a BA from Georgetown and a joint MBA/MA from Wharton School and the Lauder Institute at UPenn. 

Brian Vo


Executive Director, Pact Ventures 


Brian Vo leads the Pact Ventures team, which was launched to magnify Pact's global social impact by leveraging impact capital and other innovative approaches to sustainable funding and financing. Prior to Pact, Brian was a director at Quantified Ventures, where he designed outcomes-based transactions for nonprofit and for-profit social enterprises. With McKinsey & Company's Strategy/Corporate Finance and Public/Social Sector Practices, Brian advised clients on a range of topics including economic development, growth strategies, capital allocation, operational turnarounds, and transaction structuring. Previously, he was with Macquarie's Private Equity Group and Jefferies & Company Investment Bank. Brian holds an MBA and BS from the Wharton School, University of Pennsylvania.

Thomas Kipligili


Country Director, Tanzania


Thomas Kipligili is Acting Country Director for Pact Tanzania, where he oversees the country office's five programs that address poverty and marginalization among the Tanzanian communities. He is a public health professional with more than 24 years of experience leading and managing complex humanitarian and health development programs in Tanzania.  Prior to joining Pact, Thomas was a Senior Public Health and System Strengthening Advisor with Deloitte Consulting Ltd. Prior to that, Thomas worked for Management Sciences for Health as Technical Advisor for the Rapid Funding Envelope for HIV/AIDS in Tanzania where he technically managed $23 million worth of HIV/AIDS projects. He has an MPH from Muhimbili University); BA from the University of DSM); a Diploma in Clinical Medicine; and certificate in Applied Epidemiology from Emory University/CDC.

Amon Exavery


Director of Research, Pact Tanzania

Amon Exavery is the Research & Learning Coordinator for Pact’s USAID Kizazi Kipya Project in Tanzania. He is an active Biostatistician with nearly 10 years of experience in quantitative and qualitative data analysis, health research, and program monitoring and evaluation in Tanzania. He has worked extensively in the areas of reproductive, maternal, newborn, and child health, adolescent reproductive health, and HIV/AIDS. Amon is our measurement man on the ground, and has already conducted a baseline evaluation for the gemstone pilot program in two districts in Tanzania. He holds an MSc. degree in Population–based Field Epidemiology from the University of the Witwatersrand, Johannesburg, and a bachelor’s degree in Statistics from the University of Dar es Salaam in Tanzania. He has authored over 12 research papers, and co–authored over 20 others in national and international journals.


Pact Ventures


Recognizing that the classic development model alone is insufficient to solve social challenges, Pact created Pact Ventures, a team that  approaches development through the lens of creative financing vehicles and market-based incentives. More information: https://www.pactworld.org/country/pact-ventures



Everledger is a frontier technology company and has invested significant in-kind support to ensure that blockchain technology works for everyone, including remote ASM producers.  

Nineteen48 & ANZA Gems


Nineteen48 and ANZA Gems are commercial partners in this program but have put countless hours on design and field time to ensure this solution is both commercially feasible AND works for the ASM gem producers in region. #Leadership

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Help us grow through grants! Contact Pact directly with grant discussions:  +1 202-466-5666