File:Sample_of_jet_2013.JPG · Wikimedia Commons · See Wikimedia Commons
Key facts
- Category
- Mineraloid
- Formula
- Variable, but rich in carbon
- Color
- Black, occasionally brown
- Cleavage
- None
- Fracture
- Conchoidal
- Tenacity
- Brittle
- Mohs scale hardness
- 2.5–4.0
- Streak
- Brown
- Specific gravity
- 1.3–1.4
- Optical properties
- Isotropic
- Refractive index
- 1.640–1.680
- Dispersion
- None; opaque
- Ultraviolet fluorescence
- None
- Common impurities
- Iron, sulfur
via Wikipedia infobox
Wikidata facts
- Subclass of
- lignite
- Image
- Gagat-Holzmaden.JPG
Show 3 more facts
- Commons category
- Jet (lignite)
- topic's main category
- Category:Jet (lignite)
- different from
- Jais
Sources (2)
via Wikidata · CC0