Building consumer trust through transparency in the diamond industry

The global fine jewellery industry is evolving, shaped by changing consumer preferences and growing expectations around transparency. According to IBEF, India’s Gems & Jewellery market size stood at ₹7,31,255 crore ($85 billion) in January 2026 and is projected to expand to ₹11,18,390 crore ($130 billion) by 2030. For the diamond industry, this presents an opportunity, but sustaining demand requires more than product innovation. It requires confidence in the information underpinning every transaction.

As consumers encounter a wider range of jewellery offerings, accurate product disclosure becomes increasingly important. Natural and laboratory-grown diamonds have distinct origins and production processes, which must be communicated clearly. Transparency is not merely a retail obligation; it is fundamental to ensuring that consumers understand what they are purchasing and that businesses can substantiate their product claims.

Reliable information is essential at every stage of the diamond value chain. Manufacturers and retailers play an important role in communicating product details, while independent gemological institutions provide scientific assessments of a diamond’s characteristics based on established grading standards. Clear descriptions and reliable documentation help ensure that consumers have access to accurate information, enabling them to make informed purchasing decisions. Strengthening transparency and access to dependable information is therefore a shared industry responsibility.

Standardised grading and pricing transparency

Standardised grading is central to this effort. Diamonds have individual characteristics that influence their commercial value. The Four Cs—cut, colour, clarity and carat weight—provide a recognised framework for describing these characteristics. However, their effectiveness depends on consistent, technically sound assessment. Standardised and independent grading provides a common reference for evaluating diamonds, helping reduce ambiguity and supporting more informed commercial decisions.

Grading does not establish a universal market price or guarantee future resale value. Rather, it documents a diamond’s assessed characteristics, while market demand, supply conditions and other commercial factors influence its price. This distinction matters because pricing transparency depends on both reliable product information and a clear understanding of the factors that determine market value.

Independent gemological assessment and supply chain transparency

Independent gemological institutions have an important role in establishing this foundation. Through technical expertise, established assessment procedures and verifiable reports, they provide information that consumers and trade participants can use to evaluate product claims. Accreditations such as ISO/IEC 17025, which sets requirements for the competence of testing and calibration laboratories, provide an additional framework for demonstrating technical capability within an accredited scope.

Ultimately, the credibility of independent assessment rests on technical competence, consistency and accountability. It is an important part of the infrastructure that supports trust, rather than simply documentation accompanying a sale.

Grading must also be distinguished from traceability. While grading assesses a diamond’s characteristics, traceability documents its journey through the supply chain. Together with appropriate origin disclosure, these mechanisms can strengthen transparency across production, processing, distribution and retail. Their effectiveness, however, depends on reliable records and consistent practices across the value chain.

This has particular relevance for India, a major centre for diamond processing. McKinsey & Company has estimated that 90 per cent of natural diamonds are cut and polished in India. Maintaining credible assessment practices and reliable documentation is therefore important not only for individual transactions but also for the confidence of businesses and consumers engaging with the wider supply chain.

Ultimately, consumer trust is an economic consideration, not merely a matter of reputation. When product information is clear, consistent and verifiable, consumers are better equipped to make informed decisions, while businesses can build stronger relationships with their customers. This requires accurate product disclosures from manufacturers and retailers, alongside independent gemological assessments conducted in accordance with established scientific standards. Together, these practices support greater transparency and help consumers make confident purchasing decisions.

The diamond industry’s long-term growth will depend on its ability to earn and sustain that confidence. By making accurate disclosure, standardised grading and independent assessment integral to industry practices, stakeholders can strengthen accountability and build a more dependable marketplace.

The author is MD & Global CEO, International Gemological Institute