Natural vs Lab Grown Gemstones: What Reports Tell You

Natural and laboratory grown describe how a gemstone formed. A laboratory report describes findings from an examination. These are different things, so “certified versus synthetic” is not a sound way to compare gemstones.

Both natural and laboratory grown stones can have laboratory documentation. The important questions are what the material is, how its origin is described, which treatments are detected and whether the report matches the piece you are considering.

Natural, synthetic and imitation

A natural gem forms in nature. A synthetic gem is made by people and has essentially the same chemical composition and crystal structure as its natural counterpart. An imitation is a different material used to resemble another gem. These terms should be stated clearly in the description and purchase paperwork.

What a laboratory report can establish

GIA's sample colored stone reports show the type of information an identification report provides: gem identity, natural or laboratory grown status and detectable treatments. Depending on the stone and service, a report may also provide an opinion on geographic origin.

Read the actual report rather than relying on the word certified. Not every report offers the same service or conclusion. Geographic origin, when reported, is not a complete history of ownership or a record of every business that handled the stone.

Check the issuing laboratory, report number and description. Ask the seller to explain how the report has been matched to the stone, especially when it is already mounted.

What a report does not promise

A gemological report does not guarantee investment returns, a future resale price or that a purchase is the right value for you. Nor should it be treated as proof of ethical sourcing unless the specific document and supporting records address that subject.

Ask separately about price, condition, repairs, return terms and sourcing claims. A stone can be correctly identified and still be unsuitable for the setting, lifestyle or budget you have in mind.

Can you tell from a photograph?

A photo can show the design, visible wear and some aspects of appearance. It cannot reliably settle natural versus synthetic origin. Neither “too perfect” nor “has inclusions” is a dependable test for a buyer. Different materials and treatments can require specialized testing.

Do not scratch a stone or try destructive home tests. Use the available documentation and qualified examination when identity matters to the purchase.

How to choose

• Appearance: Compare the actual color, proportions and light performance you enjoy.
• Disclosure: Confirm the material, origin and known treatments in writing.
• Wear: Consider the gemstone, setting and any care restrictions together.
• Budget: Compare similar pieces without assuming a label guarantees appreciation.
• Documentation: Ask which reports are included and what remains unknown.

For an existing piece, bring its reports, receipts and any known history to an evaluation. They can provide useful context, but the jewelry itself still needs examination.

Review a piece with us

Browse our jewelry collection or contact Diamonds by Raymond Lee with the listing you are considering. We can discuss the information available for that piece without relying on broad promises about every gemstone.