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Vishnevite
Vishnevite
☒

Blue John
Blue John
☒



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Vishnevite
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Blue John
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
-9999
Uneven
Perfect
5-6
-
 
-
-
-
3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Blue Gemstones

Plumbogummite
Plumbogummite
Riebeckite
Riebeckite
Rosasite
Rosasite
Blue John
Cordierite
Blue John Vs Cordierite
Blue John
Glaucophane
Blue John Vs Glaucophane
Blue John
Hauyne
Blue John Vs Hauyne

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