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Chiastolite
Chiastolite

Jet lignite
Jet lignite



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Chiastolite
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Jet lignite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.00-3.15
-
Indistinct
5-5.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006)
 
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-
-
1.30-1.34
-
None
2.5
C