The Coloured Gemstones Working Group is committed to a transparent, responsible and vibrant jewellery industry.

About Us
The Coloured Gemstones Working Group (CGWG) unites leading luxury brands and mining companies with a common interest in catalysing positive change in the coloured gemstones and jewellery industry.
Through collective action and agreement, the CGWG aims to advance transparency, sustainability and responsible business practices in the vibrant coloured gemstones and jewellery industry.
The CGWG was established in 2015 with a common interest in creating positive change through the responsible sourcing of coloured gemstones. Today the members of the CGWG are:
• Chopard (CGWG member since 2019);
• Gemfields;
• Kering;
• LVMH Watches & Jewelry;
• The Muzo Companies (CGWG member since 2017);
• Richemont International SA;
• Tiffany & Co.
Gemstones and precious metals are produced in over 50 countries worldwide - with much of these resources being mined by artisanal and small-scale miners. The cutting and polishing industry employs small and family-run businesses. Our industry plays a vital economic role in many developing countries and supports millions of people worldwide.
To protect the traditions, crafts and livelihoods of these communities, we need to improve industry standards of corporate accountability, labour practices, environmental protection and governance.
It is time for a collective effort from the businesses and communities that rely on and work in this industry to harness business as a force for change - to build a path together to a more just, balanced and sustainable world.
Our Values
Community: We recognise that we are part of a larger community, and we measure our success against how we benefit the industry as a whole.
Diversity: We strive to show deep respect for the many different people, types of organisations and institutions that work within our community, from sole traders to multi-nationals, trade organisations and government agencies.
Inclusivity: We work together to achieve solutions to tough challenges both inside and outside our own organisations and in society at large.
Accessibility: We make the outputs of our collective work freely available to the members of our community and strive to do so in ways that are easy to understand, use and disseminate.
Continuous improvement: We do not expect perfection from day one, but we are committed to improving our performance, and that of our community members and industry, one step at a time.
Transparency: We are open about our plans, successes and setbacks; our organisation and partners; and, the means by which we support our work.
The Founding Members
The Coloured Gemstone Working Group (CGWG), unites luxury brands and mining companies with a common interest in catalysing positive change in the responsible sourcing of coloured gemstones.
In 2015, Tiffany & Co., Swarovski, Richemont, LVMH, Kering and Gemfields formed the CGWG. The Muzo Companies joined in 2017, Chopard in 2019 and Audemars Piguet in 2022.
The CGWG aims to help businesses in the gemstones and jewellery supply chains be more sustainable, and make responsible sourcing part of the way they work.
The Vision of the CGWG
The CGWG’s vision is to “provide businesses in the coloured gemstone industry, regardless of size and at every phase of the supply chain from mining to retail, with the knowledge, guidance, tools, operating standards, and a community of expert practitioners to help them embed sustainable practices in their sector; measure and monitor their performance against widely acceptable responsible business practices; and demonstrate their commitment to a transparent and ethical industry.”
The CGWG vision statement, and its reason for being, is built on a deep understanding of the challenges faced by coloured gemstones supply chain entities of different size, type, and along different stages of the value chain, which too often: (a) do not have access to a harmonised understanding of what it means to be a responsible business or supplier, (b) to not have the resources or tools to integrate and formalise good sustainability practices, and (c) do not know how to demonstrate, or gain recognition for, being a responsible business or supplier, in a way that meets the peculiarities of their business, the expectations of their stakeholders (including clients and end consumers), and facilitates market access and the continuous improvement of the industry. Those issues are relevant not only for the coloured gemstone industry, but also for the entities involved in the jewellery industry more generally.
The Mission of the CGWG
By uniting a broad group of companies active in the coloured gemstones supply chains, the CGWG mission is to advance transparancy, sustainability and responsible business conduct in the coloured gemstones and jewellery value chains.
As a result of collective action, the CGWG members will be able to enhance ESG risk management practices and create more positive impact across the value chain [in particular in source countries], support corporate compliance and reputation, and realize cost efficiencies.
The CGWG is action-oriented and impact-focused. The CGWG will therefore seek to establish partnerships and coordinate with other initiatives that may support its mission of advancing sustainability and responsible business practices in the coloured gemstones and jewellery industry.
Disclaimer: The CGWG members’ activities are undertaken with an understanding of the importance of compliance with all applicable laws and regulations, including but not limited to laws and regulations relating to antitrust and competition. The CGWG members undertake at all times to act in accordance with, and strictly adhere to, the letter and the spirit of all applicable national and international antitrust and competition laws and regulations (Antitrust Laws).
The CGWG Members

Powered by TDi Sustainability
The information, tools and resources have been developed by TDi Sustainability on behalf of the CGWG. They are provided free to all businesses, big and small, in the gemstone and jewellery supply chain.
TDi Sustainability is a firm that advises, audits and creates tailored sustainability strategies and solutions for businesses across the length and breadth of the minerals, metals and jewellery supply chains. This expertise, which includes; responsible sourcing, sustainable production, risk management, due diligence and auditing, make TDi the perfect partner to manage the CGWG and develop the learning materials and tools for the Gemstones and Jewellery Community Platform.