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Hessonite
Hessonite
☒

Blue John
Blue John
☒



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Hessonite
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Blue John
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.55-3.73
Uneven
None
7-7.5
Ca3Al2(SiO4)3
 
-
-
-
3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Compare Brown Gemstones

Brown Gemstones

Sonolite
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Staurolite
Staurolite
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Tantalite
Blue John
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Magnetite
Blue John Vs Magnetite
Blue John
Manganaxinite
Blue John Vs Manganaxinite

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