The Responsible Jewellery Council (RJC) has unveiled its latest guidelines for lab-created diamonds and colored gemstones. The new Laboratory Grown Materials Standard (LGMS), developed over two years, sets clear rules for business practices in areas like legal compliance, human rights, environmental management, and product grading.
The LGMS includes 28 provisions grouped under five key objectives. While adherence to these standards will be optional for RJC members during the first year, the organization has described this as a “transitional phase” to allow members time to adapt.
RJC Chairman Dave Meleski emphasized the council’s commitment to ethical practices. “Our mission is to promote responsible business practices from the laboratory or mine to the retail store,” he said. “With the LGMS, we’re not just setting standards—we’re envisioning a future where elegance and ethics coexist. Every diamond, whether mined or lab-grown, can be celebrated without compromising our values.”
The RJC, a global standards-setting body for the jewelry and watch industry, boasts over 2,000 members across 74 countries. The announcement comes as executive director Melanie Grant steps down after two years in the role.
The new standards aim to ensure transparency and sustainability in the growing lab-created diamond sector, aligning with the RJC’s broader mission to foster ethical practices throughout the supply chain.
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