For August 2026, gemstone jewelry buyers should verify the stone's identity, treatments, grading documents, and care requirements before purchasing. Natural, laboratory-created, and imitation stones may look alike, but they are different products with different disclosure needs. Natural gems form in nature. Laboratory-created gems are manufactured but share the natural gem's chemical, physical, and visual properties, while imitations use different materials and merely resemble natural stones.
Table of Contents
- Is the gemstone natural, laboratory-created, or imitation?
- Can you identify a laboratory-grown diamond by looking at it?
- Which treatments should a seller disclose?
- What do carat, grading reports, and appraisals tell you?
- How reliable is a gemstone country-of-origin report?
- What is the safest way to clean gemstone jewelry?
Is the gemstone natural, laboratory-created, or imitation?
The Federal Trade Commission distinguishes these three categories by origin and composition. Its consumer guidance on buying gemstones explains that laboratory-created gems have the same essential properties as their natural counterparts, while imitations do not. Price or appearance alone cannot establish which category a stone belongs to.
Read the product description, sales receipt, and any laboratory report for precise terms such as "natural," "laboratory-grown," "laboratory-created," "imitation," or "simulated." The FTC's jewelry-marketing guidance says sellers should conspicuously identify laboratory-created stones as manufactured rather than mined. Simulated stones should be identified as imitation or simulated. Ask the seller to repeat the exact description in the final sales paperwork.
Can you identify a laboratory-grown diamond by looking at it?
No. Ordinary observation cannot reliably separate a natural diamond from a laboratory-grown diamond because their chemical and optical properties are essentially alike. The Gemological Institute of America says identification requires laboratory examination and advanced testing.
A buyer should not rely on sparkle, color, magnification, or a salesperson's visual inspection when diamond origin affects the decision. Request independent laboratory documentation for a significant purchase. Confirm that the document describes the same stone and answers the relevant question, including whether the diamond is natural or laboratory-grown.
Which treatments should a seller disclose?
Gemstone treatments can change appearance, care requirements, and value. According to the FTC, sellers should disclose a treatment when it is nonpermanent, requires special care, or materially affects the stone's value. Its gemstone purchasing guidance also advises buyers to obtain treatment, origin, size, and care claims in writing.
GIA examines diamonds for treatments including laser drilling, glass filling, coating, high-pressure/high-temperature processing, and irradiation. For colored stones, it examines heating, irradiation, fracture filling, coating, dyeing, and diffusion. Before paying, ask for paperwork that states: A vague answer is not a substitute for documentation. If a treatment could affect value or maintenance, resolve the question before the return period or any mounting alteration complicates the purchase.
- Whether the stone has been treated
- What treatment was used
- Whether that treatment is permanent
- Whether it creates special cleaning or repair restrictions
- What origin, size, and care claims the seller is making
What do carat, grading reports, and appraisals tell you?
Diamond quality is commonly evaluated through cut, color, clarity, and carat weight—the 4Cs. GIA defines carat as a measure of weight, so a higher carat number should not be treated as a direct measurement of how large a diamond will look. A diamond grading report records quality and identifying characteristics.
It does not establish a market price, guarantee monetary value, or serve as an appraisal. If you need a value for insurance or resale planning, obtain a separate appraisal. Keep both documents: the grading report addresses the stone's characteristics, while the appraisal addresses monetary value for its stated purpose.
How reliable is a gemstone country-of-origin report?
For colored gemstones, a laboratory's country-of-origin conclusion is an expert opinion based on the submitted stone's properties. It does not prove that the laboratory witnessed the stone being mined or maintained a chain of custody from the mine.
GIA notes that similar geology in different countries can make a definitive conclusion impossible. Read an origin finding as scientific interpretation, not absolute proof, and pay attention when a report declines to name one country.
What is the safest way to clean gemstone jewelry?
Ultrasonic cleaners are unsuitable for filled or coated stones, pearls, coral, amber, and some heat-sensitive gems. GIA recommends warm water, mild soap, and a soft brush as the safer general method for most colored gemstones.
Check the seller's treatment and care disclosures before using any machine. If the paperwork identifies filling, coating, or special heat sensitivity, do not use ultrasonic cleaning.