Topaz
On the label: Topaz · Gemstone
What it is
An aluminum silicate, Mohs 8. Natural topaz is mostly colorless or pale; the common blue (Swiss blue, London blue) is made by irradiating and heating colorless stones, which is standard and disclosed by honest sellers. Imperial topaz is the rare orange-pink.
Gemstones: Natural gemstones, as mined and cut. Hardness (Mohs scale) says what scratches what; treatment (heat, oil, dye) must be disclosed under FTC rules.
Wikidata: Nesosilicate mineral. Q134985 →
In the research
11 PubMed papers mention it with jewelry, allergy, eyewear or UV; the three most recent:
- Color Adjustment and Fluorescence Matching of Single-Shade Composites: Spectrophotometric and Photographic Analysis Techniques · Polymers, 2026
- Radiation dose to the eye lens and the shielding efficacy of a protective eye mask in patients with Hodgkin lymphoma undergoing repeated CT examinations · Radiation protection dosimetry, 2025
- A comprehensive study on the gemological and mineralogical characteristics and coloration mechanisms of four color varieties of natural topaz · RSC advances, 2025
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
3 on the siteMatched from the words in the supplier's listing; the full material line is on each product page.
Made in the USA
Made in the USA
Made in the USA
Other gemstones
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.