Labradorite
On the label: Labradorite · Gemstone
What it is
Feldspar with flashes of blue, green and gold (labradorescence); Mohs 6 to 6.5. 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: Mineral: intermediate member of a solid solution series (50 to 70 % anorthite and albite). Q430062 →
In the research
1 PubMed papers mention it with jewelry, allergy, eyewear or UV; the three most recent:
- Optical absorption, TL and IRSL of basic plagioclase megacrysts from the pinacate (Sonora, Mexico) quaternary alkalic volcanics · Radiation protection dosimetry, 2006
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
4 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
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.