How is the market differentiating between natural and lab-grown diamonds, and what signaling do retailers use?

• A. Lab-grown stones are explicitly labeled and priced separately from natural diamonds.
• B. Lab-grown stones are never certified.
• C. Retailers label origin explicitly and provide separate certificates.
• D. Lab-grown diamonds are illegal in most markets.

Answer: (C)

Clear disclosure of origin and independent verification are what the market relies on to differentiate natural from lab-grown diamonds. Retailers signal this by explicitly labeling whether a stone is natural or lab-grown and by providing separate certificates or grading reports for each category. A natural diamond typically comes with a certificate from a recognized lab that confirms natural origin and its characteristics, while a lab-grown stone has its own certificate indicating growth in a controlled environment. This separation helps customers understand what they’re buying, supports apples-to-apples comparisons, and aligns with disclosure norms and consumer protection expectations. Some might assume lab-grown stones aren’t certified or that labeling isn’t standardized, but in practice the strongest signaling is explicit origin labeling paired with separateCertification for each type.