Platinum
On the label: Platinum · Metal
What it is
Element 78, a dense white metal that does not tarnish. Jewelry platinum is usually 950 (95 percent) or 900; it is heavier than gold, develops a soft patina with wear, and is hypoallergenic for almost everyone.
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: Chemical element with symbol Pt and atomic number 78. Q880 →
In the research
749 PubMed papers mention it with jewelry, allergy, eyewear or UV; the three most recent:
- Nucleotide excision repair in tumor response to DNA-damaging anticancer therapies: a comprehensive review · Journal of cancer research and clinical oncology, 2026
- High-Detectivity MOCVD-Epitaxial h-BN-Based Vacuum UV Photodetectors With Pt Nanoparticle-Engineered Localized Surface Plasmon Resonance Enhancement · Nanophotonics (Berlin, Germany), 2026
- Plasmon-enhanced reductive defluorination of PFAS in water under ambient conditions · Nature water, 2026
A paper is a paper, not a verdict: titles are listed so you can read them, and a study on one fabric or one filter says little about the piece in your hand.
Pieces whose listing names it
9 on the siteMatched from the words in the supplier's listing; the full material line is on each product page.
Made in the USA
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.