How do gem labs indicate whether a diamond is natural or lab-grown on a report?

• A. Natural or Lab-grown (HPHT/CVD) with notes about origin and any treatments.
• B. They mark it as Lab-grown only.
• C. They note it as Natural only when required.
• D. They use a color-coded origin label on the report.

Answer: (A)

Understanding how gem labs report origin distinguishes natural from lab-grown diamonds, including growth method and treatments. On a report, you’ll see the origin clearly stated as either a natural diamond or a lab-grown diamond, with the specific growth method noted when applicable (HPHT or CVD). The report may also include notes about any treatments or enhancements the stone has undergone. This explicit labeling provides full disclosure about where the diamond came from and what processing it has experienced, which matters for value, grading interpretation, and buyer information.

Other approaches fall short because they don’t guarantee complete disclosure: merely labeling something as lab-grown omits the particular growth method; noting “natural only when required” creates inconsistency; and relying on color codes doesn’t offer the precise, text-based origin and method details that professional reports provide.