Natural describes formation without human intervention; laboratory-grown or synthetic identifies a human-made counterpart to the named gem; simulated identifies a different material used to imitate its look.
A disclosure-led comparison of natural, laboratory-grown or synthetic, and simulated stones that keeps formation, material identity, treatments, and jurisdictional wording distinct.
What this guide covers
- Identify the exact gem material before reading origin or treatment language.
- Separate natural formation, laboratory growth, simulation, and later treatment.
- Keep the full disclosure visible beside the gem name and verify the governing jurisdiction.
Three labels that answer different questions
Formation
- Natural: Formed without human intervention
- Laboratory-grown or synthetic: Human-grown counterpart to the named gem
- Simulated or imitation: Natural or human-made material used to resemble another gem
Material relationship
- Natural: The named natural gem
- Laboratory-grown or synthetic: Essentially the named gem's defining composition, structure, and properties
- Simulated or imitation: Different composition, structure, or properties from the gem being imitated
Disclosure question
- Natural: Ask whether it is treated
- Laboratory-grown or synthetic: State laboratory-grown or another permitted qualifier with the gem name
- Simulated or imitation: State simulated or imitation with the gem name
- Guidance: Exact permitted language depends on material and jurisdiction.
Use a four-question naming method
Method
Ask what the material is, how it formed, whether it was later treated, and which disclosure rules govern the sale. This prevents origin and treatment from collapsing into one label.
Words that should not be swapped
Natural is not untreated
A naturally formed gemstone can later be treated, so treatment remains a separate disclosure.
Laboratory-grown is not simulated
A laboratory-grown counterpart shares the named gem's defining material identity; a simulant is a different material.
Synthetic needs a noun
In gemological use, synthetic should identify the specific human-made counterpart, not act as a vague synonym for imitation.
Keep the qualifier clear and close
Disclosure
Current US FTC guidance calls for clear, conspicuous material-status wording with the gem name. CIBJO is voluntary trade guidance, and neither source replaces current law in the sale's jurisdiction.