24-karat gold
On the label: 24k gold · Metal
What it is
99.9 percent gold. Deep yellow, very soft, dents and scratches with ordinary wear; used in some Asian and Middle Eastern traditions and in bullion-style pieces rather than Western daily jewelry.
Metals: Solid metals: what the piece is made of all the way through. Purity is written as karat (gold) or parts per thousand (925 silver, 950 platinum).
Wikidata: Gold of high purity, i.e. pure gold (24 karats, 999‰; at least 995‰ for Good Delivery bars); also the pure gold content of an alloy. Q141791874 →
In the research
No PubMed papers mention this material with jewelry, allergy or eyewear; that is usual for findings and trade terms.
Pieces whose listing names it
2 on the siteMatched from the words in the supplier's listing; the full material line is on each product page.
Other metals
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.