gemstone
Jet
Lignite (Precursor organic rock)
AI-generated identification · may be incorrectHardness is 2.5 to 4 on the Mohs scale, color is deep black or dark brown, and luster ranges from vitreous to waxy. It features amorphous crystal structure and conchoidal fracture.
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Physical properties
Hardness is 2.5 to 4 on the Mohs scale, color is deep black or dark brown, and luster ranges from vitreous to waxy. It features amorphous crystal structure and conchoidal fracture.
Formation & geological history
Formed from the extreme pressure and compaction of decaying woody material buried in marine or lacustrine sedimentary basins over millions of years.
Uses & applications
Historically carved into mourning jewelry, ornaments, and rosary beads. Today, it remains popular among collectors and lapidary artists.
Geological facts
Jet was famously utilized extensively during the Victorian era for mourning jewelry following the death of Prince Albert. It is remarkably lightweight for a stone.
Field identification & locations
Identified by its warm touch, low density, and dark brown streak. Commonly found in Yorkshire, England, and various deposits across Spain, the US, and France.
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