Sodalite
On the label: Sodalite · Gemstone
What it is
Royal-blue silicate with white veins, Mohs 5.5 to 6; untreated.
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: Tectosilicate mineral. Q410759 →
In the research
5 PubMed papers mention it with jewelry, allergy, eyewear or UV; the three most recent:
- Investigation of photochromic films containing Na(8)Al(6)Si(6)O(24)(Br,S)(2) · Dalton transactions (Cambridge, England : 2003), 2026
- Isotropic zero thermal expansion in sodalite crystals from 11 to 893 K · Nature chemistry, 2026
- Preparation of ultramarine green pigments by recycling of the discarded molecular sieves for green vegetation spectral simulation · Scientific reports, 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
2 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
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.