Circular Medusa pendant with the transverse suspension tube across the top of the head showing signs of wear. The back is highly polished. The sketchy depiction — Photo: Photographed by: York Museums Trust Staff · CC BY-SA 4.0
Jet
Also known as: Whitby jet.
Fossilized driftwood compressed to coal rank — a jet-black organic gem carved since the Bronze Age, especially in Victorian mourning jewelry.
Intro adapted from Wikipedia (CC BY-SA).
Jet is a mineraloid, with the chemical formula C — fossilized wood.
It crystallizes in the amorphous crystal system.
Key properties: Mohs hardness 2.5–4; typically black or brown.
Collections: Gemstones, Collector Favorites.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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