Materials glossary / Organic material
Akoya cultured pearl
On the label: Akoya pearl · Organic material
What it is
Saltwater pearls from Japan and China, bead-nucleated, round, with the brightest luster; 6 to 9 mm, white with rose or cream overtones.
Organic materials: Materials made by living things: pearls, amber, coral, shell, jet, bone. Softer than mineral stones and sensitive to acid, heat and perfume.
In the research
1 PubMed papers mention it with jewelry, allergy, eyewear or UV; the three most recent:
- Trivalent Iron Is Responsible for the Yellow Color Development in the Nacre of Akoya Pearl Oyster Shells · Marine biotechnology (New York, N.Y.), 2020
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.
Other organic materials
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.