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Friedelite
Friedelite
☒

Blue John
Blue John
☒



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Friedelite
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Blue John
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.06-3.19
Uneven
{010} Perfect
4-5
Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.
 
-
-
-
3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Compare Red Gemstones

Red Gemstones

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Nepheline
Neptunite
Neptunite
Pyrope
Pyrope
Blue John
Imperial Topaz
Blue John Vs Imperial Topaz
Blue John
Jadeite
Blue John Vs Jadeite
Blue John
Manganotantalite
Blue John Vs Manganotantalite

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