gemstone
Jet
Lignite (Precursor organic rock)
AI-generated identification · may be incorrectHardness 2.5 to 4 on Mohs scale, deep black or dark brown color, vitreous to greasy luster, amorphous crystal structure.
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Physical properties
Hardness 2.5 to 4 on Mohs scale, deep black or dark brown color, vitreous to greasy luster, amorphous crystal structure.
Formation & geological history
Formed from the extreme compaction, heat, and carbonization of deeply buried driftwood from extinct araucarian trees during the Jurassic and Cretaceous periods.
Uses & applications
Used primarily in mourning jewelry, carved ornaments, and occasionally in metaphysical practices.
Geological facts
Jet was extremely popular in Victorian England for mourning jewelry following the death of Prince Albert. Despite being a mineraloid, it is warm to the touch compared to true stones.
Field identification & locations
Identified by its very light weight, warm feel against skin, and brown streak. Found prominently in Whitby, Yorkshire, England, and various global deposits.
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