Materials glossary / Standard and mark
FTC Jewelry Guides
On the label: FTC Jewelry Guides · Standard and mark · a rule or standard applies
What it is
The US Federal Trade Commission's rules for how jewelry may be described: when 'gold' needs a karat, what 'gold-filled' and 'vermeil' mean, that treatments and lab growth must be disclosed, and that a simulant may not be called the stone it imitates.
Standard and marks: The marks, tests and laws behind the words on a label: karat stamps, UV400, ANSI Z80.3, the FTC Jewelry Guides, Prop 65.
In the research
No PubMed papers mention this material with jewelry, allergy or eyewear; that is usual for findings and trade terms.
Other standard and marks
Clasp & Lens describes materials from the public record and does not appraise, grade or test pieces; what a listing states is the supplier's statement. If a piece causes a rash, take it off; a reaction that spreads or blisters is a doctor's question, and sunglasses are no substitute for impact-rated eye protection where that is required.