Materials glossary / Organic material
Jet
On the label: Jet · Organic material
What it is
Fossilized wood, black and very light, Mohs 2.5 to 4; the Victorian mourning-jewelry material. 'French jet' is black glass.
Organic materials: Materials made by living things: pearls, amber, coral, shell, jet, bone. Softer than mineral stones and sensitive to acid, heat and perfume.
Wikidata: Australian rock band. Q750460 →
In the research
555 PubMed papers mention it with jewelry, allergy, eyewear or UV; the three most recent:
- Cyclohexene Oxidation Initiated by Ozone: Linking Ozonolysis to Low-Temperature Combustion Chemistry · The journal of physical chemistry. A, 2026
- Is Photoelectron Circular Dichroism Sensitive to Helical Chirality? The Paradigm of Gas-Phase Carbo[6]Helicene · Angewandte Chemie (International ed. in English), 2026
- Significantly Improving the Power Capability of Water-Jet Guided Laser: An Optical Breakdown Suppression Strategy via Axial Multi-Focal Beam Shaping · Micromachines, 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.
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.