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Common Opal
Common Opal
☒

Charoite
Charoite
☒



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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.98-2.50
Conchoidal
None
5.5-6.5
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
 
-
-
-
2.54-2.78
Conchoidal
Good in three directions
5-6
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Blue Gemstones

Fluorapatite
Fluorapatite
Gadolinium Gallium Garnet
Gadolinium Gallium Garnet
Gahnite
Gahnite
Charoite
Covellite
Charoite Vs Covellite
Charoite
Cyprine of Berzelius
Charoite Vs Cyprine of Berzelius
Charoite
Dravite
Charoite Vs Dravite

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